Firefox Community Forum

Hello! Since the latest update to Firefox (153, I believe) my Firefox has not worked. It starts up perfectly fine, but quickly freezes, becomes non-responsive, and needs to be closed. No matter how many times I attempt to open it, the same thing occurs. There’s been been occasions where it hasn’t frozen immediately so I have been able to turn off hardware acceleration as well as remove my theme and disable all my add-ons/extensions, but this has done nothing. Creating a new profile does not help, nor does trying Safe Mode: the same thing happens no matter what. I tried to reinstall the update, but this also did nothing. I haven’t yet tried to uninstall & reinstall or do a Firefox refresh as those are my last resorts and I won’t do them unless I’m sure they’ll make a difference. I haven’t downloaded any new extensions recently, and this only started happening after the most recent update. I’m not sure what else I can try at this point, and am very frustrated.

Hello, After the last update i keep seeing a blank page when i open a new tab or new page. i tried the troubleshooting mode but the same. i need to refresh every time i open a new page.

On a new laptop with Win11 Home (x86-64) with Firefox just installed, the cache size is 54 MB. When Privacy and Security -> Clear Browsing Data is clicked, Firefox hangs - no input is accepted and nothing appears to be happening. On closing Firefox and then reopening the cache size is reduced and Clear Browsing Data operates as expected.

Why is the cache size (54 MB) so large? Why does Clear Browsing Data hang Firefox?

An 8 second delay when I open Firefox for the first time.. Once it has been opened once, it reopens immediately when required. The problem has been present since I installed Linux Mint 9 months ago, Linux Mint 22.2 then, since upgraded to 22.3 Zena. I can live with it, but it is very frustrating! I have tried the obvious things like removing extensions, but I suspect it is a "Linux" connectivity problem rather than a "Mozilla" problem.

Dear Mozilla Firefox Support Team,

I have been a loyal Firefox user for many years because I have always appreciated its speed, privacy, and reliability. However, I have noticed that Firefox has become slower over time, and I am disappointed with its current performance.

The browser feels increasingly sluggish during everyday use. One of the biggest issues I experience is with YouTube, where videos often do not play as smoothly as they should. I also notice that Firefox consumes a significant amount of RAM, even when only a few tabs are open, which affects the overall performance of my computer.

I sincerely hope the Firefox team will prioritize performance optimization in upcoming updates. Many users, including me, want a browser that is fast, lightweight, responsive, and efficient with system resources. Speed and smooth performance are some of the main reasons people choose a browser, and I would love to see Firefox become the quickest browser again.

Please continue improving memory management, reduce unnecessary resource usage, and optimize YouTube and other modern websites for a smoother browsing experience.

Thank you for your hard work and for listening to user feedback. I hope future releases will focus on making Firefox faster, lighter, and more responsive.

When firefox is loaded and as high as 13 can load. If go to task master and search for firefox it shows 13. If I try to delete 1 file all are deleted. If I delete firefox and try to add it again it says I already have firefox loaded.

I am a user and not good at using all sort of commands etc

I have tried safe mode. No joy, but it has shown plain vanilla FF is the issue, not extensions.

(I'm using a different browser to make this report, so Share Data button is of no use here.)

Watching any Bilibili live stream causes severe performance issues. The main problems I can observe are intermittent severe mouse cursor stuttering/frame drops or the cursor becoming unresponsive, accompanied by the taskbar process (explorer.exe) intermittently restarting.

I have tried disabling the Picture-in-Picture feature and tampermonkey add-on, modifying the Windows 11 registry to turn off MPO (Multiplane Overlay), adjusting browser hardware acceleration, and tweaking related settings in about:config, but none of these have been able to prevent the issue.

Hello everyone,

I've recently noticed that Firefox has become slower than usual. Some websites take a long time to load, and occasionally the browser feels unresponsive even though my internet connection seems to be working fine. I've already tried restarting Firefox and clearing the cache, but the issue still occurs.

Has anyone experienced something similar or found a solution that improved Firefox's performance? Any suggestions would be appreciated.

Thank you!

Dear Support,

Firefox exhibits significant performance and usability issues related to its cookie and data storage management. Despite implementing ad blocker extensions, the browser remains saturated with cookies and persistent advertisements. Regularly clearing browsing data and cookies is necessary; however, navigating to the settings menu is time-consuming. I recommend developing a browser widget that facilitates rapid data clearing directly from the toolbar or frame. Additionally, implementing a session-saving feature to preserve a set of pinned tabs upon closing and reopening the browser would enhance workflow efficiency, allowing for a quick start with a predefined workspace.

This is all happening while using it for simple tasks like search or copying a text.

Furthermore, the browser experiences severe performance degradation when utilizing certain web applications, such as Kapwing for video editing. Since uninstalling Vivaldi, I am considering migrating to an alternative browser due to these issues. Tasks that typically require one minute are now prolonged to hours, as the browser intermittently becomes unresponsive, effectively limiting usability. This sluggishness persists even after system restarts, with CPU utilization reaching approximately 50%, as detailed in the attached performance report. Notably, I encountered a significant delay—up to an hour—to correct a single spelling error or open a new tab, indicative of underlying performance bottlenecks.

Please address these issues to improve browser stability and usability.

Estimator Just tell me how long this is probably gonna take: 4 to 16 hours. Not kidding!

Добрый день. Сегодня обновился у меня браузер до последней версии и перестал нормально открывать странички сайтов открывает и через время зависает почините пожалуйста скрин смотрите вот так все зависает и не отвисает

Was using computer and was interrupted by Firefox update. Got the "See What's New" window, closed it to have Firefox open in the new tab. Won't open, tried three times got nit responding each time. Shut down computer, started over. Booted up abd Firefox partially opened and now, again, not responding. When I close it reports to Microsoft. Try to open again, same result.

My Firefox browser was updated to the most recent version (153.0). And since then, it will always freeze up within a few minutes of me opening it, even in troubleshooting mode. Even if I keep clicking, it’s still stuck and I’m forced to close it.

I did turn off hardware acceleration before, and it still doesn’t work.

When my system slows down and takes forever to download, I go to task manager and find 15-20 entries for Firefox when I have only 1 or 2 pages open. Why are they continuing to pile up and slow down my machine and how do I stop it from happening?