Tag: firefox

Mozilla uses Mythos to fix 271 bugs in latest Firefox, claims «vertigo»

The Mythos model is only available to select organizations for defensive cybersecurity. (Picture: generated)
The browser developer has been working with Anthropic since February, and got their hands on an early version of Claude Mythos Preview to scan for vulnerabilities.

— For a hardened target, just one such bug would have been red-alert in 2025, and so many at once makes you stop to wonder whether it’s even possible to keep up, Mozilla writes in their blog.

The upshot is that the 271 bugs mean that the company can approach security «much better than just keeping up», and that «defenders finally have a chance to win, decisively.»

— We have many years of experience picking apart the work of the world’s best security researchers, and Mythos Preview is every bit as capable, Mozilla continues.

They used Claude Opus 4.6 to find 22 bugs back in March, but this Mythos-powered bug hunt was so large it left them with a feeling akin to vertigo, they say.

Read more: Mozilla’s blog, interview on Wired, writeups on Ars Technica and Engadget.

Firefox soon to let you block AI features

You can soon turn off AI features in Firefox, through all future updates. (Picture: Mozilla)
Mozilla, the makers of the open source browser, are introducing both overall and granular control over the AI features of the browser.

— AI is changing the web, and people want very different things from it. We’ve heard from many who want nothing to do with AI. We’ve also heard from others who want AI tools that are genuinely useful, they write on their blog.

That doesn’t mean they won’t follow the rest of the world in rolling out ever bigger AI features, though — because they will. They are just offering an off-ramp for people who don’t like it.

The AI toggle in settings will be permanent, and move through future updates, so it won’t be borked sometime in the future.

Currently, Firefox uses AI for translations, alt-text in PDFs, enhanced tab grouping, link previews, and an AI assistant sidebar, which works across a whole host of providers. You will be able to turn these off indiviually, or toggle the whole thing off.

The feature will debut in Firefox 148, which rolls out on February 24.

Read more: Mozilla’s announcement, Mashable, Engadget, MacRumors.