2044448 - firefox in Android is too laggy

Status: UNCONFIRMED

(Firefox for Android :: Performance, defect)

Description

[Leo_sk]

Attachment: Record_2026-06-03-00-22-45_984e1414ae90666a90f12ff17ec14a7f.mp4

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0

Steps to reproduce:

1. Open any page with more than minimal use of JavaScript or css (reddit.com in example)
2. Scroll up and down

Actual results:

Scrolling is laggy even on most modern hardware. The jitteriness is more pronounced at higher refresh rate. Can be somewhat reduced by disabling hiding of toolbar while scrolling

Expected results:

Scrolling should be smooth as in firefox desktop

Comment 1

[Leo_sk]

Attachment: comparison with brave browser (recording is 60fps, its even smoother than apparent)

Comment 2

[Leo_sk]

Should add that this issue is present on multiple different devices with varied android versions, the one above being oneplus pad 4, which has the best chipset currently in android ecosystem. So this is a firefox issue

Comment 3

[Skye]

Same issue. Firefox is a laggy mess in Android whenever we scroll. It is especially worse in certain pages with a lot of dynamic elements. The same websites work completely smooth on Chromium-based browsers (including Chrome, Edge, Brave, and even Vivaldi). Hope Firefox developers could do something about it. At the current state, even many hardcore Firefox fanboys are avoiding the Android version.

Comment 5

[Leo_sk]

(In reply to Skye from comment #3)

Same issue. Firefox is a laggy mess in Android whenever we scroll. It is especially worse in certain pages with a lot of dynamic elements. The same websites work completely smooth on Chromium-based browsers (including Chrome, Edge, Brave, and even Vivaldi). Hope Firefox developers could do something about it. At the current state, even many hardcore Firefox fanboys are avoiding the Android version.

Strangely, it has resolved for me since updating nightly 5-6 days back. Websites are smoother to scroll. Not as smooth as chrome/chromium based stuff, but much better and usable than before

Comment 6

[Leo_sk]

(In reply to Leo_sk from comment #5)

Strangely, it has resolved for me since updating nightly 5-6 days back. Websites are smoother to scroll. Not as smooth as chrome/chromium based stuff, but much better and usable than before

Should add though that I had also made a significant number of changes in about:config related to webrender, scrolling etc. So if others are still experiencing the bug, I can share the changed preferences (though i haven't worked out which one made the difference, if any)

Comment 7

[Skye]

(In reply to Leo_sk from comment #6)

(In reply to Leo_sk from comment #5)

Strangely, it has resolved for me since updating nightly 5-6 days back. Websites are smoother to scroll. Not as smooth as chrome/chromium based stuff, but much better and usable than before

Should add though that I had also made a significant number of changes in about:config related to webrender, scrolling etc. So if others are still experiencing the bug, I can share the changed preferences (though i haven't worked out which one made the difference, if any)

Are you having smooth experience even in product pages of Lenskart? Especially any product page.

In Chrome and other browsers, those pages are scrolling at pure 120 FPS but Firefox (and Nightly) seems to stutter a lot.

Also, I scrolling in Reddit is much better even in my Fireflx (stable) without making any special changes.

Comment 8

[Leo_sk]

(In reply to Skye from comment #7)

(In reply to Leo_sk from comment #6)

(In reply to Leo_sk from comment #5)

Strangely, it has resolved for me since updating nightly 5-6 days back. Websites are smoother to scroll. Not as smooth as chrome/chromium based stuff, but much better and usable than before

Should add though that I had also made a significant number of changes in about:config related to webrender, scrolling etc. So if others are still experiencing the bug, I can share the changed preferences (though i haven't worked out which one made the difference, if any)

Are you having smooth experience even in product pages of Lenskart? Especially any product page.

In Chrome and other browsers, those pages are scrolling at pure 120 FPS but Firefox (and Nightly) seems to stutter a lot.

Also, I scrolling in Reddit is much better even in my Fireflx (stable) without making any special changes.

Yes, its working quite well. I will attach a recording for the same

Comment 9

[Leo_sk]

Attachment: Record_2026-06-14-10-49-56_984e1414ae90666a90f12ff17ec14a7f.mp4

Screen recording showing scrolling with latest nightly with no issues

Comment 10

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:kaya, could you have a look please?

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