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Manifest V2 phase-out begins
(blog.chromium.org)
This is a most excellent place for technology news and articles.
On Firefox Android Beta / Nightly / forks, you can enable WebRender from about:config .
WebRender has been enabled by default on Firefox for Android since version 92 (September 2021). Performance is fine for me, especially with uBlock Origin.
uBlock Origin works best on Firefox, according to the extension author. This is definitely a reason to use Firefox, and even more so when Chromium phases out Manifest V2 completely.
Your Samsung Galaxy Tab S5e has a PassMark score of 5488. I've been happy with the performance of Firefox on a Google Pixel 3a, which has a nearly identical PassMark score of 5483. Maybe your expectations or experiences are different, but I'm comfortable with saying that Firefox's performance is fine for me on a range of Android devices, old and new.
Some of its features are still considered experimental and disabled on Android to provide compatibility with most devices.
Two informative Reddit posts that are mostly up-to-date:
https://www.reddit.com/r/firefox/comments/11shvus/fixing_performance_problems_in_firefox_on_android/
https://www.reddit.com/r/browsers/comments/1278zp5/improving_performance_in_firefox_android_part_ii/
@BaardFigur@lemmy.world