Firefox Support Forum

I am a startup founder. I'm making a webgl rendering engine. I'm doing a stress test with 4 large paragraphs amounting to tens of millions of triangles on a macbook air. Firefox is on the latest version.

When I run the app in chrome/safari/opera, the performance is normal. ~45fps. But in Firefox, it's very slow. My FPS counter (in a requestAnimationFrame loop) says ~45fps on all browsers. But in Firefox, even though the counter says that, the real frame rate is ~3-5fps.

When I try to profile, the problem magically goes away and we're back to ~45fps. I played around with profiler settings, and the key determinant is whether or not I'm taking screenshots. No screenshots = slow. Screenshots = fast.

In the flame graph, in slow mode (no screenshots), it seems like I get stuck in the canvasRenderer and the Renderer mostly waits for it. But in fast mode (with screenshots), the canvasRenderer keeps up and the Renderer spents most it's time in: iokit_user_client_trap

I'm not sure what to do. This is only a problem on Firefox. There's some sort of gpu/threads/something that switches when I profile with screenshots that makes it way faster. This performance hit basically ruins my app for Firefox only. Any idea what I should do?

I have been using Firefox on my Huawei P29 for several years. I have Google UK set as my search engine and on my home page and this has been fine for years. Two or three days ago when I loaded Firefox Google UK and Google.com wouldn't display. The link flashes in the top bar but the page stays blank. They will load in Chrome and in Firefox if I have desk top mode switched on, but not in android mode. I have uninstalled and reinstalled Firefox, cleared the browser cache but no change. Getting pretty fed up with wasting my time sorting it out. Is it the Huawei phone or Firefox's last update?

I use firefox with duckduckgo as my search engine.Every search was becoming so slow so I went to settings and deleted cookies and site data thinking this would unclog things. Now I cant access any site. Is there a way to reinstate this data?

When I moved my data from my old Windows 7 to my new Windows 11 computer, I used a Mozilla account to upload and save my bookmarks. I then transferred my data using a different method.

I would now like to delete my data from this (Mozilla) site but can't find it. Please show me how to clear all my bookmarks, passwords (!!!), everything from this site.

Thanks

On a couple of sites (e.g. Petapixel) when I click "Load Comments", nothing happens. I suspect this may be because Firefox security is preventing comments from loading because of site tracking or other security issues. Is this the cause?

UbuntuStudio 22.04 uses the Firefox Snap package by default. The latest automatic update does not display pages correctly in normal mode, but does work correctly on Safe Mode. Snap.io lists only the latest version of Firefox so I was unable to ask snap to revert to the previous release (prior to 5 Mar 24) and by the time I had tried to investigate the previous version was no longer cached. I did not see a way to force a fresh download of firefox from the latest channel on snap.io.

I tried the snap beta channel for v124, but that exhibited the same problems.

I tried adding a symbolic link to colors.css after seeing firefox complaining that it could not be found when started from the command line. That removed the error/warning message but did not clear the problem with normal mode.

I use the en-GB locale extension only. The technical details about my PC are as follows:

• Operating System: Ubuntu Studio 22.04
• KDE Plasma Version: 5.24.7
• KDE Frameworks Version: 5.92.0
• Qt Version: 5.15.3
• Kernel Version: 6.5.0-25-lowlatency (64-bit)
• Graphics Platform: X11
• Processors: 12 × AMD Ryzen 5 7600 6-Core Processor
• Memory: 30.5 GiB of RAM
• Graphics Processor: RAPHAEL_MENDOCINO

I have now downloaded v123 and installed it in my local home directory, and that version is working well. I have removed the firefox channel via snap. It is likely to be a fault in the construction of the snap for v123 that was not present for v122 prior to 5 Mar 24.

Often, when I go to a website with a store, a website called "coupon2deal" (coupontodeal.com) will pop up. It will be at the beginning of my list of tabs, and it will have a miniature tab with no exit button (I need to right-click it to exit). I believe this may have started after I installed the Honey extension, a similar service, but it has not gone away after uninstalling Honey. I tried blocking the site, but the tab still pops up, just with the website blocked.

Hello!

I can't figure out what setting to fix this: every time I click to open a new window, about 35 tabs automatically open up that I have closed several times in the past. I simply want one new window without any previously opened tabs.

I've tried:

• clearing my entire search history several times
• shutting down Firefox and reopening (which opens up all those tabs)
• uninstalling Firefox and reinstalling it
• initiating the latest Firefox updates
• restarting my computer
• turning my computer on and off
• looking through every single preference in my Firefox settings (I've unchecked anywhere it talks about opening tabs)
• reading various articles on Firefox's support page and on other support websites to try to figure this out (there's little info on this problem; the support is mostly about how to save previously opened tabs

Please help! I'm tired of having to close down all these tabs every single time I have to restart my computer or have to shut down Firefox. It slows down everything I'm trying to do.

Thank you!

Hi,

I've been using the following in userChrome.css for many years

1. menu_close { display: -moz-box !important; }

to restore "Close Tab" in the File menu, based on cor-el's response regarding restoring menu_bookmarkAllTabs here:

https://support.mozilla.org/en-US/questions/799856

This stopped working some time ago and I am finally getting around to asking why.

I do have toolkit.legacyUserProfileCustomizations.stylesheets set to true, and other items in userChrome.css are working.

I am using 121.0 at home and 115.0 ESR at work and see the same (i.e. no "Close Tab"), in both cases on Debian testing. I do see this menu item when using the keyboard to open the File menu.

Any idea why this no longer works?

thank you, Greg

I'm still using windows professional 7, it works for the most part. Unfortunately often the browser won't load or it will load and runs very slowly, then it shows a box saying close previous firefox. When it is running slowly I often have to hit the browser many times until the box shows up saying close previous firefox. Is this something to do with windows 7 or another completely different issue.

How do I add a link to the start page that shows when you open a new tab? I've read support docs and I don't have a "pin icon" on my toolbar... I'm on MacOS (M1) and latest (Feb '24) FireFox...... how can it be so non-intuitive? I can't find an option anywhere...

i troubleshooted everything , I did a refresh , things got worse Amazon just isnt loading Other quirks after the refresh like opening a window instead of a tab ( yes my settings show tab) It causes other websites to run slow i turned off my ghostery , ran in trouble shoot mode, amazon works fine in chrome ( which i downloaded just to check , please don't make me go to chrome )

I've been with firefox since netscape 1

Im trying to use 192.168.1.131 to acess a netgear wireless point the Firefox is stopping me from going to this legit site I have turned everything off and still no luck I keep getting a non trust certificate Blaine

I have attached images of what slowly occurs when I don't clear my cookies, websites start to slowly and slowly load less and less until they eventually completely break and wont load and I have to clear my cookies, resign into everything. and rinse and repeat every few days or a week, I also attached an image of what the purchase screen is supposed to look like. Looking at this via Microsoft edge