منتدى دعم ”Firefox“

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?

Auto play blocking is no longer working.

media.autoplay.block-event.enabled true media.autoplay.blocking_policy 3 [tried 2] media.autoplay.default 5 [tried values]

Anyone have good values that block auto playing videos?

Videos (with the exception of those on YouTube) have no sound, and in some cases such as Amazon or Plex, fail to play at all. Amazon directs me to plugins, and to select 'Always Activate' on Widevine Content Decryption, and to update plugins. This was already the case and had no effect. Plex, in some cases, simply gives the error: 's4032 (Manifest)', though this could be a different issue. Other videos on Plex have the same problem of no sound. This problem doesn't occur on other browsers like Chrome or Edge.

Hello, sometimes firefox seems like it is working fine, other times certain sites like youtube, duckduckgo and spotify will not load, while others will.

I've gone through and done everything the help articles suggest, nothing happens - then a few days later everything's fine. It's gone on like this for a few months. Any help would be greatly appreciated.

thanks -alex

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.

PR_END_OF_FILE_ERROR how do I get rid of this error that keeps popping up when I attempt to launch Amazon.com I have never had this happen before..... it just started about a week ago.

When I try to open a new tab, the dot continues to move back and forth but does not load the tab. Sometimes I have gotten the message: "A web page is slowing down your browser. To stop it close the page."

I have tried fixes suggested on the web, but no help, including clearing the cache.

Thank you in advance.

Hello, I use Firefox on Windows 11 . Since my computer became so slow, I checked task manager and found that Firefox is eating up my memory. It is described as Firefox(35) and is using about 2690MB. I would like to know how to reduce memory use if possible. Best regards.

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.

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

Safari is showing the links seen in blue after each line but FireFox is leaving them out. Some type of bug or coding problem. This began happening 3-4 months ago. It used to work fine on FireFox. Would love to stay using FireFox and avoid the Safari thing. Love the browser!!! Mark Miller

Windows 10 Pro v 22H2 Firefox 121.0.1 (64-bit)

I have tried preventing Firefox from autostarting with Windows start up by examining these potential program starting locations:

Firefox-Settings-General: "Open Firefox automatically when your computer starts up": Option not available about:config - toolkit.winRegisterApplicationRestart - set to "false" No listing for Mozilla or Firefox in Windows 10 "Startup Apps" settings page No listing for Mozilla or Firefox in Windows 10 msconfig.exe/System Configuration-Startup No listing for Firefox in Windows 10 Task Scheduler No Firefox program in Windows 10 - %appdata%\Microsoft\Windows\Start Menu\Programs\Startup folder All Firefox extensions (2) are disabled

Where else should I be looking? Thank you

Hi,

I experienced at least two times recently that the browser on windows 10 looses all the opened tabs and pinned tabs too. Last time it did also that when I closed the program and it opened itself again immediately without tabs and closed itself down again. Next time I opened the program there was no opened tabs at all again. I have the latest version for windows 10.

What do you suggest me to do?

Thanks for help! Br, Balint

Im running Firefox on Apple Silicon and I really do wish that there was a way to change settings to adjust experience when using the browser. As for my current needs I wish there was a barebones mode I could enable because currently it's an energy hog and I am becoming discouraged to continue using it with this inefficiency.

Ill explain my use case, I do lots of research for school, and tend to work with 30-50 tabs at a time and by simply having Firefox open it drains my laptops' battery 3 to 4 X (times) faster. While the same tabs on Safari and even newly released DuckDuckGo Mac app can run those tabs for days while still sipping on battery.

another occassion is during my job search, these tabs will stay open for a week or two as I open jobs im applying to, using 'Skillsyncer' and bunch of gmail tabs. I prefer my laptop to lose 5% battery in 2 hrs instead od 3 minutes.

As things are now, Firefox is not well optimized and would like to let the Firefox team to add the mentioned functionality above. Sadly there's no way to reach out to their team and am instead forced to post here. For now I will refer to Firefox to 'Firefix' as there's plenty to fix.

Hi -- I hope someone can help with this recent problem that has cropped up. Videos that are supposed to be autostart, such as news stories embedded on pages of news sites or video feeding into a side panel on a college sports site I frequent are just continually in buffer mode with the little spin icon in the middle of the screen. This also happens with some, but not all, YouTube videos.

This is a recent development and I didn't do anything to change my setup. I did try updating to make sure I have the most recent version of Firefox, so that's been accounted for. If I close out Firefox and come back to it after a couple of minutes, the problem is cleared, but it only lasts a little while before it begins once again.

Any suggestions? Thanks!

For the past week or so, Firefox has been resetting the tab I am using. The whole tab will suddenly go blank except for blank placeholders for buttons, frames, etc., after which a few seconds later the tab reloads. If I was watching a video, that video is still there but has been reset to the start. There does not seem to be any particular trigger (I read another thread from about a year ago in which another user described the same problem.) I have never seen this kind of random reset/reload behavior in Firefox. Let me know if there is a way to collect more information if possible. Thanks for your time.