Diễn đàn hỗ trợ Firefox

As the Subject line says, Firefox will act like it's working normally for a little bit but shortly after using it websites stop loading and no new websites can be accessed. Usually after about 10 minutes. Closing and reopening Firefox restarts the cycle. Works for a bit, then stops. Other browsers like Microsoft Edge and Google Chrome work fine.

I've checked my Firewall, deleted and re-added Firefox, made sure it had both Public and Private Network access. Also tried using Firefox in Troubleshoot mode and tried resetting Firefox. Same behavior, made no difference.

I don't see any error messages when this happens. Tabs just spin and load indefinitely with nothing ever appearing in the window. Anyone have any ideas?

Hi Mozilla Community,

I run a food-focused website that showcases restaurant menus, and I’m currently having trouble with one specific page—https://olive-garden-menu-with-prices.us/—which loads significantly slower in Firefox compared to other browsers like Chrome or Edge.

The page is mainly text and optimized images, and I’ve minimized scripts as much as possible. Still, Firefox seems to hang while rendering or takes a long time to fully display content. Could this be due to any specific Firefox rendering behavior, caching issues, or something I may be overlooking?

Any tips on how to debug or optimize page performance specifically for Firefox would be really appreciated. Thank you!

I am having issues with sites, where I can access main page but then when i try to move onto another area of the site I just get spinning. I have had this on different sites, from Amazon, Disney. I have tried clearing cache, i have made sure Firefox up to date but can be very sporadic.

Hello! After a clean install of Windows 11 24h2 Pro, Mozilla Firefox is unusable. It takes about 2 minutes to load a page which is abnormal. I remember I had the same issue when I first installed Windows 11 23H2 Pro and that was resolved somehow but it was 2 or 3 years ago and I've no idea what the solution was back then. I've tried some basic stuff including Test suggestion which of course didn't resolve anything as almost all of them are referring to cleaning cache, reinstall Firefox etc and it literally has nothing to do with my situation. Any solutions?

Chrome user returning to Firefox here; I'm experiencing an issue where most pages would take at least 4 to 6 seconds to load, especially for heavy media sites like YouTube which could take 6 seconds for it to be barely usable, and 10 or 13 seconds for it to finish loading. My internet speed is 1gb at most and 800 Mbps at the least.

It loads sites like Reddit pretty fast, like 3-5 seconds interestingly. It's largely YouTube and other sites where the pages load infuriatingly slowly, and Chrome Mask did not helped with this.

Here are the things I did: Refreshed Firefox, started in Troubleshoot mode, installed Chrome Mask for YouTube (Did not work), disabled DNS, closed all foreground apps except Firefox, used a different profile and enabled/disabled hardware acceleration.

Specs: CPU: i5-3570k GPU: GTX 1070 Ti RAM: 16gb DDR3 OS: Windows 10 Hard Drive type: SSD

Final notes, it says I use Microsoft Defender Antivirus but I am actually using Malwarebytes. I also use uBlock Origin which is the entire reason why I permanently switched from Chrome to Firefox.

For the last few months I've been getting slow responses with online applications. When I switch to chrome, it all runs at a normal pace. Specifically with " The Customer Factor"

For days I have been seeing Firefox be very slow to load a page (as in minutes) or stop working entirely. At the same time Chrome works fine. Mac Mail has become intermittent as well. I have uninstalled Norton products and changed Network proxy settings many times. Nothing helps. I have created new profiles. I switch between profiles. I have hacked into my WiFi router. Nothing, nothing helps. Safari hangs up too. Firefox on my android phone continues to work properly when using my Wifi router -the same router my Mac Studio connects to the internet with. I can access my third party mail service via Firefox on my android phone. Both FireTV devices work. I am at my wit's end. At this point I have shifted all of my work over to Chrome.

I have cleared caches. I have gotten rid of all cookies. I have restarted Firefox and rebooted my computer countless times.

Mac OS Sequoia 15.5 Firefox 138.04

When I open any stream, it takes about 2.5 seconds from the start of the page loading to the appearance of the stream image and playback. For comparison, in version 137 it took about 1.0 seconds.

I tried to launch the browser (Firefox 138.0.1) in troubleshooting mode, and also created a new profile, but the problem remained.

I also downloaded portable versions: 137.0.1 - everything is fine. 138.0 and 140.0a1 - slow loading.

I also have Zen Browser installed (the latest version is based on 138.0.1) - everything is fine.

- Translated via Google Translate.

I use several browsers and when it comes to functionality I consider FFox to be the best however with 1 major drawback - it's speed / lag issues which is why I stopped using it as my primary browser and only as secondary one

I can have 2 different Chromium based browsers open simultaneously and while this impacts the performance somewhat if I open Firefox and another browser responsiveness grinds to a halt (sometimes even crashes)

Even just starting Firefox by itself takes 5x as long as other browsers

So I'm wondering is Firefox just more resource intensive or is there something wrong with my setup?

The main difference between my Firefox install and my other browsers is the number of Bookmarks (10000s) due to me having it installed for much longer so is it possible for a large number of Bookmarks to slow the browser down even when not open ?

Other possible causes I read elsewhere are 'Cookies and site data' (currently around 50mb)

I clear the 'Temporary cached files' & 'Browsing history' on regular basis so they shouldn't be an issue

The add-ons I have installed are NoScript , Ublock Origin & Firefox Color

In regards to troubleshooting is it possible to install a 2nd install on the same system simultaneously without overwriting the current one ?

Thanks

Hello,

I have problem with some specific web pages like below that keeps loading and refreshing again and again until account gets lock.

login.microsoftonline.com

Regards,

Aqeel

Running - when open to run webtrading site, I got message - This page is slowing down Firefox. To speed up your browser stop this page. And stop button. And the webtrading site stops anyway. Could you help Please. Thank you, Frank

Just the past week, if I leave the browser open for a while, it hangs when I try to refresh a tab or open a new one. I've got 7 tabs open (could this be too many?) I have to close the browser and restart and then it works. I've been using Firefox for years and years and this is the first time I've ever experienced this.