Chromium based browsers have non-google sync. Vivaldi implements their own encrypted sync service and I believe Brave does as well.

But I am talking about browser feature support, not stuff that can supplemented with an extension like a password manager.

Firefox has poor support for modern web features including video processing and encoding which makes it very bad at web conferencing/video calls or in-page streaming.

Firefox's developer tools and console is also much worse and missing important features.

Other features Firefox is missing or has poor support for compared to Chromium are WebGPU, WebTransport, Periodic Background Sync, and parts of WebRTC. Plus various APIs for web serial, badging, and Web Share are missing partial or full support.

Firefox still doesn't have functional HDR for images and videos including AV1.

Oh I thought you meant actual chromium browser.

Those seem rather marginal features from my pov but of course once you need them, you need them, I guess.

Also, for context: ’Some truth here, but it’s overstated.

Firefox does WebRTC fine. AV1 works, simulcast works, calls and streaming work. Chrome still leads on performance tweaks and extra APIs, but “very bad” is just wrong.

DevTools aren’t “much worse.” Different, less popular, sometimes better (CSS, network). Chrome wins mainly because everyone targets it first.

API gaps are real but the list is sloppy. WebGPU and WebTransport exist in Firefox now, just behind on advanced bits. Periodic Background Sync barely matters. WebRTC support keeps closing the gap.

Missing stuff like Web Serial, Badging, fuller Web Share? True, and mostly intentional.

HDR is the weakest claim that actually holds. AV1 decode exists, but HDR support still feels half-done.

TL;DR: Firefox lags Chromium in breadth and polish, not in core modern web capability. Calling it bad for video or modern apps doesn’t match reality.” ’