[Minor49er]

Theoretically, perhaps. But I'm not super worried about it. I only visit a handful of sites and have scripts and third-party resources blocked by default and have HTML5 features disabled. I have Firefox (and all of my browsers) sandboxed in my system.

Most of the important bug fixes from Firefox as of late have been in these areas that I have disabled, such as WebGL rendering, responsive design mode, 3D CSS, custom fonts [1], WebRTC [2], and so on.

[1] https://www.mozilla.org/en-US/security/advisories/mfsa2021-1... [2] https://www.mozilla.org/en-US/security/advisories/mfsa2021-1...

I'm more worried about some new feature introducing a security hole through one of these new features intended for modern browsing. Given the number of unfavorable changes that come with every release compared to the number of fixes, though, I'd rather just skip the auto updates for now. I only update when I (reasonably) know that nothing that I'm used to will be irreversibly broken/removed and when I have the time and patience to update my userChrome again to keep things as they are.