I-Firefox Community Forum

I downloaded Firefox not too long ago to combat the fact the Microsoft Edge wasn't working correctly, but ever since I downloaded Firefox it's been making my computer run really slow on the browser. Things are often slow like scrolling up on and down pages websites like Pinterest, and the text when typing on Google docs takes a moment to show up after I've typed it and not instantly, for example.

I checked my computer's task manager because I recently cleaned the laptop, thinking that something else was causing it to be slow, but it isn't. I don't have many processes open on the computer mainly mandatory things and my browser, since I use my laptop mainly for school work, music, or writing. Firefox opens multiple processes, the highest being 21 at one time, and takes up most of the memory on the laptop. Is this normal? Because it takes 1,094.0 MB and keeps my laptop's memory at 90-91%. If it isn't normal, how can I reduce this as well as the lag on my laptop when Firefox is open?

I attached a photo as well.

Since updating to Firefox 141.0 (Win11), I've had issues with performance and on-screen behaviour of dynamic web pages/sites. The problems do not manifest on Chrome, or on a reinstalled version of Fx 140.0.4 on the same computer running at the same time (and with copy of original profile's data files, extensions etc.).

The manifesting problems:

• Screen pointer rapidly switching between standard arrow pointer, mouse with index finger (clickable link) and serifed-style insertion bar, even when positioned on a part of the page that is not a link or a text box. Video (MP4, <1MB) showing behaviour at https://imgur.com/a/absjTh4.
• Browser intermittently fails to respond to browser actions (mouse clicks, keyboard entry)
• Small increase in browser CPU usage

Problem is worse if general CPU usage is already high. (I run BOINC on 10 of 12 CPU cores; problem is not quite as bad if I reduce BOINC to 6 cores and isn't observed when BOINC is temporarily suspended from computing.) The problem happens on dynamic pages (e.g. gmail.com, boardgamearena.com/lobby) but doesn't seem to happen on static pages.

The fact that I can see the problem occurring on Fx 141 but have Fx 140.0.4 working fine at the same time on the same page, suggests that this is a Fx 141 issue. Regular malware scanner and an alternate found no issues.

Happy to do more diagnostic testing if it's helpful.

It seems that scrolling periodically stops working, whenever I encounter nested scrolling on a page, eg. gemini.google.com with enabled canvas.

I scroll through the file, and then can't scroll through the conversation (However I can keep scrolling inside the file window). It usually starts working again in a few minutes.

It seems only whne playing a game at the moment but when you click the louse, it locks on and drags items everywhere and i have to click it several times to release, i know it must be firefox because i did try it on opera and don't get the same issue but i loathe that browser like the plague so would prefer to use this, would anyone have any idea please?

Using desktop 141.0, noticed issue of the hand pointer either not appearing, or appearing for less than a second and disappearing when hovering over buttons/urls/etc elements. Sometimes it stops being buggy for a minute or so and then goes back. I can't figure out the exact cause for this, but maybe going outside of the window of the browser ? Consistent in the safe mode, on different websites. See the gif for the visual

Firefox 141.0 update has made everything move very slow. Pages will only partially load then take several seconds to completely fill out. If you click on something, the little dot on the browser tab will be gray for several seconds and then eventually turn blue and open the page. It's like it's having to think a little bit before opening the page. Everything just seems delayed.

Starting today when using firefox browser my cursor has started to flicker between the pointer and the hand erratically. There is also a delay when trying to type anything in a text box, search bar or browser address bar which is making it hard to operate. I have refreshed, restarted and also reinstalled firefox a fresh and still no luck. It's specific to my wacom pen that i use. I have been using firefox for decades and don't want to change to another browser - but if i cant solve this I might have to.

I also reinstalled wacom drivers, disabled the hardware performance setting in firefox, cleared cache, updated any of my windows drivers that needed it. And now am at a loss. any ideas?

As the title says. Youtube pages consume me a lot of CPU (about 15% of usage when normally is less than 1%) and, when opened it keeps using more and more memoy (on task manager i arrived to 44.000MB for a total of 100% on memory) I already tried to refresh it instead of unistalling and the issue wasn't solved. I'm not sure but it seems that there is no memory leak in Troubleshoot mode.

So, I was downloading some Patreon stuff and Patreon isnt well optimized for browsing older posts. When you have to load multiple more pages dating backwards it slows down the Firefox quite a lot, pretty much to the point when the Firefox reach non-responding state in worst cases.

But luckily for me Patreon worked fine for me tonight, just when I was closing the Firefox, it took like 5 seconds for it to close.

I spent some short time by responding messages on Steam and Discord and then I started new Firefox window, this time I went on Netflix and when the page loaded my monitor went black and then after like few seconds it returned back with "Displayport" message on the top left corner.

When I checked Event viewer, there is nothing at all. When I checked about:crashes, there is also nothing.

Any idea what was that and how to prevent that?

this is the third time i have asked this. I love firefox but your latest updates have slowed down firefox and does things on its own like it has Ai. Google changes like this too and I will no longer us google. if nothing else let me download an older firefox. Rich Stonehouse

Yesterday after an update Firefox ate the whole physical memory and swap space. In 2025, how can it be that You cannot write a software without so huge bug? Absurd! I've been using Firefox for many years, it never caused a system halt, it is very disappointing for me.

Screen popped up invite to customize tab I added a picture, then I tried to play tetris type game and the cursor jumps around so much I can't play it. I don't understand techie stuff and do not know how to undo this change