Firefox Community Forum

As title says, whenever I'm scrolling through any website there's a lot of flickering, did some research and past "fixes" said to turn off smooth scrolling and hardware acceleration, which I tried but all it did was minimise the effects, this flickering has only been happening for the last day or so.

Firefox Developer Edition version - 139.0b1 (64-bit) Nightly version - 140.0a1 (2025-04-30) (64-bit)

Youtube video showing what's happening

Hello, I can’t scroll anymore when enabling the performance settings ([https://support.mozilla.org/en-US/kb/.../performance-settings] ).

Is this a known bug? Is there any fix?

Thanks!

I am no longer given the option of being able to scroll through my open instances of Firefox. When using my primary smaller horizontal monitor, it only shows 28 open instances. When making my larger vertical monitor the primary monitor, I can see 62 open instances (Not Tabs). Either way, the little arrow no longer pops up under the open instances list allowing me to be able to scroll to what instance I want to view.

When I scroll some sites with the touchpad, it doesn’t scroll smooth like on windows. It scroll brutally 3 lines after 3 lines. I can’t scroll a half line for example. Even if I activate “smooth scrolling”, it doesn’t scroll with the precision and the speed of the hand. I don’t if It’s a mistake in the code of gecko or in the code of firefox but could somebody fix it?

I use the email server fastmail.fm inside the Firefox browser on a 2023 Macbook pro. In the main everyday pane (the list of emails) there is a right-hand scroll bar. Frequently that scroll bar is MUCH too long, so that I cannot scroll all the way to the bottom of the list of emails. Both Apple and fastmail.fm are pretty sure they are not responsible. When the scroll bar is too long, I know a work-around, but I would like the problem not to happen.

I see a strange bug in FF desktop. It’s a bit convoluted to explain but let me try

1. I have a container web page https://htmag.co.il/forum10

It basically hosts a full height Iframe

2. So it is in fact the one scrolling (not the Iframe), so scroll down to about 50% of the page.

3. After scrolling down Navigate to an internal page by clicking a link. Scroll will reset to top

4. You can do this again just in case.

5. Now move back to the list of posts (the first link). The scroll position is lost.

I think this is because there are multiple scroll positions confusing it.

After the last update, the mouse wheel in the browser stopped working. This is very inconvenient, the pages do not scroll with the mouse wheel, only with the arrows on the keyboard.