Phoronix's Michael Larabel reports: A 21 year old bug report requesting support of the XDG Base Directory specification is finally being addressed by Firefox. The Firefox 147 release should respect this XDG specification around where files should be positioned within Linux users' home directory.

The XDG Base Directory specification lays out where application data files, configuration files, cached assets, and other files and file formats should be positioned within a user's home directory and the XDG environment variables for accessing those locations. To date Firefox has just positioned all files under ~/.mozilla rather than the likes of ~/.config and ~/.local/share.

Mozilla is officially ending its partnership with Onerep after more than a year of controversy over the company's founder secretly running people-search and data-broker sites. Monitor Plus will be discontinued by December 2025, existing subscribers will receive prorated refunds, and Mozilla says it will focus on privacy tools it fully controls. KrebsOnSecurity reports: In a statement published Tuesday, Mozilla said it will soon discontinue Monitor Plus, which offered data broker site scans and automated personal data removal from Onerep. "We will continue to offer our free Monitor data breach service, which is integrated into Firefox's credential manager, and we are focused on integrating more of our privacy and security experiences in Firefox, including our VPN, for free," the advisory reads.

Mozilla said current Monitor Plus subscribers will retain full access through the wind-down period, which ends on Dec. 17, 2025. After that, those subscribers will automatically receive a prorated refund for the unused portion of their subscription. "We explored several options to keep Monitor Plus going, but our high standards for vendors, and the realities of the data broker ecosystem made it challenging to consistently deliver the level of value and reliability we expect for our users," Mozilla statement reads.

Tech entrepreneur/blogger Anil Dash has been critical of AI browsers like ChatGPT Atlas. (He's written that Atlas "substitutes its own AI-generated content for the web, but it looks like it's showing you the web," while its prompt-based/command-line interface resembles a clunky text adventure, and it's true purpose seems to be ingesting more training data.)

And at the Mozilla Festival in Spain, "Virtually everyone shared some version of what I'd articulated as the majority view on AI, which is approximately that LLMs can be interesting as a technology, but that Big Tech, and especially Big AI, are decidedly awful and people are very motivated to stop them from committing their worst harms upon the vulnerable."

But... Another reality that people were a little more quiet in acknowledging, and sometimes reluctant to engage with out loud, is the reality that hundreds of millions of people are using the major AI tools every day... I don't know why today's Firefox users, even if they're the most rabid anti-AI zealots in the world, don't say, "well, even if I hate AI, I want to make sure Firefox is good at protecting the privacy of AI users so I can recommend it to my friends and family who use AI"...

My personal wishlist would be pretty simple:

* Just give people the "shut off all AI features" button. It's a tiny percentage of people who want it, but they're never going to shut up about it, and they're convinced they're the whole world and they can't distinguish between being mad at big companies and being mad at a technology so give them a toggle switch and write up a blog post explaining how extraordinarily expensive it is to maintain a configuration option over the lifespan of a global product.

* Market Firefox as "The best AI browser for people who hate Big AI". Regular users have no idea how creepy the Big AI companies are — they've just heard their local news talk about how AI is the inevitable future. If Mozilla can warn me how to protect my privacy from ChatGPT, then it can also mention that ChatGPT tells children how to self-harm, and should be aggressive in engaging with the community on how to build tools that help mitigate those kinds of harms — how do we catalyze that innovation?

* Remind people that there isn't "a Firefox" — everyone is Firefox. Whether it's Zen, or your custom build of Firefox with your favorite extensions and skins, it's all part of the same story. Got a local LLM that runs entirely as a Firefox extension? Great! That should be one of the many Firefoxes, too. Right now, so much of the drama and heightened emotions and tension are coming from people's (well... dudes') egos about there being One True Firefox, and wanting to be the one who controls what's in that version, as an expression of one set of values. This isn't some blood-feud fork, there can just be a lot of different choices for different situations. Make it all work.

Mozilla announced on Thursday that it is building an AI Window for Firefox, a new opt-in browsing mode that will let users interact with an AI assistant and chatbot. The feature will become one of three browsing experiences in Firefox alongside the existing classic and private windows. Users will be able to select which AI model they want to use in the AI Window, according to a post on the Mozilla Connect forum.

The company opened a waitlist for users who want to receive updates and be among the first to test the feature. Mozilla described the AI Window as an "intelligent and user-controlled space" that it is developing in the open through community feedback. Users who try the feature and decide against it can switch it off entirely.

FFmpeg, the open source multimedia framework that powers video processing in Google Chrome, Firefox, YouTube and other major platforms, has called on Google to either fund the project or stop burdening its volunteer maintainers with security vulnerabilities found by the company's AI tools. The maintainers patched a bug that Google's AI agent discovered in code for decoding a 1995 video game but described the finding as "CVE slop."

The confrontation centered on a Google Project Zero policy announced in July that publicly discloses reported vulnerabilities within a week and starts a ninety-day countdown to full disclosure regardless of patch availability. FFmpeg, written primarily in assembly language, handles format conversion and streaming for VLC, Kodi and Plex but operates without adequate funding from the corporations that depend on it. Nick Wellnhofer resigned as maintainer of libxml2, a library used in all major web browsers, because of the unsustainable workload of addressing security reports without compensation and said he would stop maintaining the project in December.

BrianFagioli writes: Mozilla has released Firefox 145.0, and the standout change in this version is the official end of support for 32-bit Linux systems. Users on 32-bit distributions will no longer receive updates and are being encouraged to switch to the 64-bit build to continue getting security patches and new features. While most major Linux distributions have already moved past 32-bit support, this shift will still impact older hardware users and lightweight community projects that have held on to 32-bit for the sake of performance or preservation.

The rest of the update introduces features such as built-in PDF comments, improved fingerprinting resistance for private browsing, tab group previews, password management in the sidebar, and minor UI refinements. Firefox also now compresses local translation models with Zstandard to reduce storage needs. But the end of 32-bit Linux support is the change that will leave the biggest mark, signaling another step toward a web ecosystem firmly centered on 64-bit computing.

A maintainer of Debian's Advanced Package Tool (APT) "has announced plans to introduce hard Rust dependencies into APT starting May 2026," reports the blog It's FOSS. The integration targets critical areas like parsing .deb, .ar, and tar files plus HTTP signature verification using Sequoia. [APT maintainer Julian Andres Klode] said these components "would strongly benefit from memory safe languages and a stronger approach to unit testing."

He also gave a firm message to maintainers of Debian ports: "If you maintain a port without a working Rust toolchain, please ensure it has one within the next 6 months, or sunset the port."

The reasoning is straightforward. Debian wants to move forward with modern tools rather than being held back by legacy architecture... Debian ports running on CPU architectures without Rust compiler support have six months to add proper toolchains. If they can't meet this deadline, those ports will need to be discontinued. As a result, some obscure or legacy platforms may lose official support. For most users on mainstream architectures like x86_64 and ARM, nothing changes. Your APT will simply become more secure and reliable under the hood.
It's FOSS argues that "If done right, this could significantly strengthen APT's security and code quality."

And the blog Linuxiac also supports the move. "By embedding Rust into APT, the distro joins a growing number of major open-source projects, such as the Linux kernel, Firefox, and systemd, that are gradually adopting Rust. And if I had to guess, I'd say this is just one of the first steps toward even deeper Rust integration in this legendary distribution, which is a good thing."

"The Firefox brand is getting a refresh and you get the first look," says a new web page at Firefox.com. "Kit's our new mascot and your new companion through an internet that's private, open and actually yours."

Slashdot reader BrianFagioli believes the new mascot "is meant to communicate that message in a warmer, more relatable way."

And Firefox is already selling shirts with Kit over the pocket (as well as stickers)...

Long-time Slashdot reader AmiMoJo shared this report from Linuxiac: The Japanese branch of Mozilla's Support Mozilla (SUMO) community — responsible for localizing and maintaining Japanese-language support documentation for Firefox and other Mozilla products (consisting of Japanese native speakers) — has officially disbanded after more than two decades of voluntary work...

SUMO, short for Support Mozilla, is the umbrella project for Mozilla's user support platform, support.mozilla.org, that brings together volunteers and contributors worldwide who translate, maintain, and update documentation, tutorials, and troubleshooting guides for Firefox, Thunderbird, and other Mozilla products... According to marsf, the long-time locale leader of the Japanese SUMO team, the decision to disband was triggered by the recent introduction of an automated translation system known as Sumobot. Deployed on October 22, the bot began editing and approving Japanese Knowledge Base articles without community oversight.
The article notes marsf's complaints in a post to the SUMO discussion forum, including the fact that the new automated system automatically approved machine-translated content with only a 72-hour window for human review. As a result, more than 300 Knowledge Base articles were overwritten on the production server, which marsf called "mass destruction of our work."

BrianFagioli shares a report from NERDS.xyz: Mozilla is testing a new Firefox feature that delivers direct results inside the address bar instead of forcing users through a search results page. The company says the feature will use a privacy framework called Oblivious HTTP, encrypting queries so that no single party can see both what you type and who you are. Some results could be sponsored, but Mozilla insists neither it nor advertisers will know user identities. The system is starting in the U.S. and may expand later if performance and privacy benchmarks are met. Further reading: Mozilla to Require Data-Collection Disclosure in All New Firefox Extensions

"Mozilla is introducing a new privacy framework for Firefox extensions that will require developers to disclose whether their add-ons collect or transmit user data..." reports the blog Linuxiac: The policy takes effect on November 3, 2025, and applies to all new Firefox extensions submitted to addons.mozilla.org. According to Mozilla's announcement, extension developers must now include a new key in their manifest.json files. This key specifies whether an extension gathers any personal data. Even extensions that collect nothing must explicitly state "none" in this field to confirm that no data is being collected or shared.

This information will be visible to users at multiple points: during the installation prompt, on the extension's listing page on addons.mozilla.org, and in the Permissions and Data section of Firefox's about:addons page. In practice, this means users will be able to see at a glance whether a new extension collects any data before they install it.

Thursday Ubuntu-maker Canonical "officially launched Canonical Academy, a new certification platform designed to help professionals validate their Linux and Ubuntu skills through practical, hands-on assessments," writes the blog It's FOSS: Focusing on real-world scenarios, Canonical Academy aims to foster practical skills rather than theoretical knowledge. The end goal? Getting professionals ready for the actual challenges they will face on the job. The learning platform is already live with its first course offering, the System Administrator track (with three certification exams), which is tailored for anyone looking to validate their Linux and Ubuntu expertise.

The exams use cloud-based testing environments that simulate real workplace scenarios. Each assessment is modular, meaning you can progress through individual exams and earn badges for each one. Complete all the exams in this track to earn the full Sysadmin qualification... Canonical is also looking for community members to contribute as beta testers and subject-matter experts (SME). If you are interested in helping shape the platform or want to get started with your certification, you can visit the Canonical Academy website.
The sys-admin track offers exams for Linux Terminal, Ubuntu Desktop 2024, Ubuntu Server 2024, and "managing complex systems," according to an official FAQ. "Each exam provides an in-browser remote desktop interface into a functional Ubuntu Desktop environment running GNOME. From this initial node, you will be expected to troubleshoot, configure, install, and maintain systems, processes, and other general activities associated with managing Linux. The exam is a hybrid format featuring multiple choice, scenario-based, and performance-based questions..."

"Test-takers interested in the types of material covered on each exam can review links to tutorials and documentation on our website."

The FAQ advises test takers to use a Chromium-based browser, as Firefox "is NOT supported at this time... There is a known issue with keyboards and Firefox in the CUE.01 Linux 24.04 preview release at this time, which will be resolved in the CUE.01 Linux 24.10 exam release."

"Plasma is a popular desktop (and mobile) environment for GNU/Linux and other UNIX-like operating systems," writes longtime Slashdot reader jrepin. "Among other things, it also powers the desktop mode of the Steam Deck gaming handheld. The KDE community today announced the latest release: Plasma 6.5." From the announcement: This fresh new release is all about fine-tuning, fresh features, and a making everything smooth and sleek for everyone. The new version brings automatic light-to-dark theme switching based on the time of day. You can configure which global themes it switches between. You can also configure whether you want the wallpaper to switch between its light and dark versions based on the color scheme, the time of day, or be always light or dark.

Next up is a "Pinned clipboard items" feature, which lets you save text you use regularly into the clipboard. Breeze-themed windows will now have the same level of roundness in all four corners, even the bottom one. Flatpak Permissions page has been transformed into a general Application Permissions page, where you can configure applications' ability to do things like take screenshots and accept remote control requests. The utility that reads the level of ink or toner from your printer now informs you when it's running low or empty.

For the gamers out there, you can now see more relevant info about game controllers on System Settings' Game Controller page. Artists among you can now configure any rotary dials and touch rings on your drawing tablet. Users sensitive to color can now make use of a grayscale color filter, which desaturates or removes color systemwide.

Plasma 6.5 implements support for an experimental version of the Wayland picture-in-picture protocol that promises to allow apps like Firefox to eventually display proper PiP windows that stay above others automatically. Support for "overlay planes" was added, which can reduce CPU usage and power draw when displaying full-screen content using a compatible GPU. You can read more about these and many other new features in the Plasma 6.5 release announcement and complete changelog.

Mozilla is testing a free, built-in VPN for Firefox that routes traffic through Mozilla-managed servers directly in the browser. The Register reports: According to a staff post on Mozilla Connect, the company's idea-sharing platform, Firefox VPN is still an experimental feature in the early stages of development, but users will be selected at random to test it "over the next few months." Moz describes the feature as one that will sit beside the search bar on Firefox, routing web traffic through a Mozilla-managed VPN server, concealing the user's real IP address while adding a layer of encryption to their communications. Firefox VPN is a different project entirely from Mozilla VPN, a separate, paid-for product. The Firefox version will be free to use and confined to the browser itself, while Mozilla VPN can be used by up to five devices at a time.

The Moz staffer on the product team who announced the feature said of the upcoming beta test: "We'll start simple, then gradually add new capabilities while learning how it impacts browsing, usage, and overall satisfaction. "Our long-term vision is ambitious: to build the best VPN-integrated browser on the market." In response to feedback, the staffer noted that while it will be a desktop browser feature first, "mobile is definitely a natural next step."

"California Governor Gavin Newsom signed the 'California Opt Me Out Act', which will require web browsers to include an easy, universal way for users to opt out of data collection and sales," reports the blog 9to5Mac: [The law] requires browsers to provide a clear, one-click mechanism for Californians to opt out of data sharing across websites. The bill reads: "A business shall not develop or maintain a browser that does not include functionality configurable by a consumer that enables the browser to send an opt-out preference signal to businesses with which the consumer interacts through the browser...." Californians will need patience, though, as the law doesn't take effect until January 1, 2027.
Americans in some states — including California, Texas, Colorado, New Jersey and Maryland — "have the option to make those opt-out demands automatic whenever they surf the web," reports the Washington Post. "But they can only do so if they use small browsers that voluntarily offer that option, such as DuckDuckGo, Firefox and Brave. What's new in California's law is that all browsers must give people the same option." That means soon in California, just using Google's Chrome, Apple's Safari and Microsoft's Edge can command companies not to sell your data or pass it along for ad targeting... It's an imperfect but potent and simple way to flex privacy rights — and becomes even more powerful with another simple privacy measure in California. Starting on January 1, California residents can fill out an online form once to completely and repeatedly wipe their data from hundreds of data brokers that package your personal information for sale.
But their article also suggests other ways readers can "try a one-click privacy option now."

• "[S]ome national companies respect one-click privacy opt-out requests from everyone... This happens automatically if you use DuckDuckGo and Brave. You need to change a setting with Firefox."

• "Download Privacy Badger: The software from the Electronic Frontier Foundation, a consumer privacy advocacy group, works in the background to order websites not to sell information they're collecting about you."

• "Use Permission Slip from Consumer Reports. Give the app basic information, and it will help you do much of the legwork to tell companies not to sell your information or to delete it, if you have the right to do so."

Mozilla Firefox's new "Shake to Summarize" feature earned a spot on TIME's Best Inventions of 2025, allowing users to shake their phone to instantly summarize long web pages. Anthony Enzor-DeMeo, general manager of Firefox, calls it a "testament to the incredible work of our UX, design, product, and engineering teams who brought this innovation to life." Neowin reports: Shake to summarize works exactly how you suspect: you physically shake your phone to generate a summary of a long article. This can be quite handy if you are trying to get the gist of a long read without scrolling through the whole thing. Other ways to activate the feature include tapping the thunderbolt icon in the address bar and selecting "Summarize Page" from the three-dot menu.

For now, the feature is limited to iOS users in the US with their system set to English, but Mozilla promises an Android version is in the works. If you have an iPhone 15 Pro or newer running iOS 26, Apple Intelligence generates the summaries on the device. For older iPhones or those on earlier iOS versions, the page text is sent to Mozilla's servers for processing. You can view the full list of TIME's "Special Mentions" here.

"We've decided to support image-based search," announced the product manager for Firefox Search. Powered by the AI-driven Google Lens search technology, they promise the new feature offers "a frictionless, fast, and a curiosity-sparking way to (as Google puts it) 'search what you see'." With just a right-click on any image, you'll be able to:

- Find similar products, places, or objects
- Copy, translate, or search text from images
- Get inspiration for learning, travel, or shopping

Look for the new "Search Image with Google Lens" option in your right-click menu (tagged with a NEW badge at first). This is a desktop-only feature, and it will start gradually rolling out worldwide. Note: Google must be set as your default search engine for this feature to appear.

We'll be listening closely to your feedback as we roll it out. Some of the things we're wondering about:

Does the placement in the context menu align with your expectations?
Would you prefer the option to choose your visual search provider?
Where else would you like entry points to visual search (e.g. when you open a new tab, in the address bar, on mobile devices, etc.)

We can't wait to hear your thoughts as the rollout begins!
Some thoughts from WebProNews: Mozilla emphasizes that this is an opt-in feature, giving users control over activation, which aligns with the company's longstanding commitment to privacy and user agency.

Yet, for industry observers, this partnership with Google raises intriguing questions about competitive dynamics in the browser space, where Firefox has historically positioned itself as an independent alternative to Chrome... This move comes at a time when browsers are increasingly becoming platforms for AI-driven enhancements, as evidenced by recent updates in competitors like Microsoft's Edge, which integrates Copilot AI. Mozilla's decision to leverage Google Lens rather than developing an in-house solution could be seen as a pragmatic step to accelerate feature parity, especially given Firefox's smaller market share. Insiders note that by tapping into established technologies, Mozilla can focus resources on core strengths like privacy protections, potentially attracting users disillusioned with data-heavy ecosystems... While mobile users might feel left out, the phased rollout over the next few weeks allows for feedback loops through community channels, a hallmark of Mozilla's open-source ethos.

Data from similar integrations in other browsers suggests visual search can boost engagement by 15-20%, per industry reports, though Mozilla has not disclosed specific metrics yet... Looking ahead, Mozilla's strategy appears geared toward incremental innovations that bolster user retention without alienating its privacy-focused base. If successful, this could help Firefox claw back some ground against Chrome's dominance, estimated at over 60% market share. For now, the feature's gradual deployment invites ongoing dialogue, underscoring Mozilla's community-driven model in an industry often criticized for top-down decisions.

An anonymous reader shares a report: Within the nightly builds of the Firefox web browser is finally the ability to support playback of Matroska "MKV" content. Enabled just within the Firefox Nightly builds for now or opting in within the media.mkv.enabled preference is the ability to support MKV playback.

Initially just AVC/H.264 and AAC within MKV containers are supported but other codec support will be expanded over time. For the past eight years there has been this feature request for supporting Matroska/MKV playback support.

The blog OMG Ubuntu notes that Microsoft Copilot chatbot support has been added in the latest Firefox Nightly builds. "Firefox's sidebar already offers access to popular chatbots, including OpenAI's ChatGPT, Anthropic's Claude, Le Chat's Mistral and Google's Gemini. It previously offered HuggingChat too." As the testing bed for features Mozilla wants to add to stable builds (though not all make it — eh, rounded bottom window corners?), this is something you can expect to find in a future stable update... Copilot in Firefox offers the same features as other chatbots: text prompts, upload files or images, generate images, support for entering voice prompts (for those who fancy their voice patterns being analysed and trained on). And like those other chatbots, there are usage limits, privacy policies, and (for some) account creation needed. In testing, Copilot would only generate half a summary for a webpage, telling me it was too long to produce without me signing in/up for an account.

On a related note, Mozilla has updated stable builds to let third-party chatbots summarise web pages when browsing (in-app callout alerts users to the 'new' feature). Users yet to enable chatbots are subtly nudged to do so each time they right-click on web page. [Between "Take Screenshot" and "View Page Source" there's a menu option for "Ask an AI Chatbot."] Despite making noise about its own (sluggish, but getting faster) on-device AI features that are privacy-orientated, Mozilla is bullish on the need for external chatbots.
The article suggests Firefox wants to keep up with Edge and Chrome (which can "infuse first-party AI features directly.") But it adds that Firefox's nightly build is also testing some non-AI features, like new task and timer widgets on Firefox's New Tab page. And "In Firefox Labs, there are is an option to enable JPEG XL support, a super-optimised version of JPEG that is gaining traction (despite Google's intransigence).

Other Firefox news:

• There's good news "for users still clinging to Windows 7," writes the Register. Support for Firefox Extended Support Release 115 "is being extended until March 2026."

• Google "can keep paying companies like Mozilla to make Google the default search engine, as long as these deals aren't exclusive anymore," reports the blog It's FOSS News. (The judge wrote that "Cutting off payments from Google almost certainly will impose substantial — in some cases, crippling — downstream harms to distribution partners..." according to CNBC — especially since the non-profit Mozilla Foundation gets most of its annual revenue from its Google's search deal.)

• Don't forget you can now search your tabs, bookmarks and browsing history right from the address bar with keywords like @bookmarks, @tabs, and @history. (And @actions pulls up a list of actions like "Open private window" or "Restart Firefox").

Mozilla announced today that they will end 32-bit Linux support for Firefox in 2026, with version 144 being the last release and ESR 140 as the fallback option. Phoronix reports: Firefox has continued providing 32-bit Linux binaries even with most other web browsers and operating systems going all-in on x86_64 support. But given that 32-bit Linux support is waning by distributions and the vast majority of distributions aren't even shipping i686 install images anymore, they will be removing 32-bit Linux builds in 2026.