Komunitné fórum Firefox

In my browsing video sites (for example, bilibili.com) there will be frequent lag. The same network conditions in Firefox just can't load or load slowly. There are only a few plug-ins. I don't know why the more updated it is, the more stuck it becomes. Or you could come out with a lite version. I don't need too many complicated features. Thank you.

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

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

When using Firefox, websites take long to open. However, when I use Chrome for the same sites they open quickly. I have cleared cache and have an updated version of Firefox. No extensions except Adobe, Trend Micro

I'm running some devices with windows 10 and 11. All have same most current version of Firefox installed. There is no issue on Win10. With any Win 11 device, some pages as google.com take about 60s until they start loading. Once started the behavior disappears until restart of the browser (even tab gets closed). I'm using classic DNS (no DoH).

Here I've uploaded the profile: https://share.firefox.dev/4coxRg4

On Network it say's "DNS request 6ms", "after DNS request 60000ms".

With wireshark I can see different kind of DNS request on Win10 A and AAA gets request, on Win11 HTTPS gets request - no idea if that makes the difference as there in no delay in the response anyway.

Any idea how to troubleshoot this?

Mein Firefox (137.0.2 (64-Bit) auf einem Windows 11-PC) lädt einige Webseiten sehr langsam. Davon betroffen sind Facebook, Threads, Instagram, Google. Andere Seiten wie z.B. youtube, spiegel.de, zdf.de etc. lädt er schnell und ohne Probleme. Cache löschen hilft nicht. Ebenso bringt ein neues Browserprofil nichts.

When browsing on Youtube it takes a long time to load and display videos. Firefox seems to be searching for a long time before finally displaying videos. I've noticed that advertisements aren't displaying before videos anymore. Sometimes when video does finally play it isn't starting at the beginning, cutting out part of the video.

I've tried clearing caches, and history.

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.

my firefox is taking forever to load any type of page, and in addiition the thunderbird is also slow. I re-downloaded mozilla, but it is still downloading so skow. just last two days, and when I say slow like 2 minutes to open a page. HELP

I'm working onoptimizing a web application optimizing a web application and noticing some performance lags (e.g., slow page load and laggy interactions) specifically in Firefox.

I’ve used Chrome DevTools for performance profiling before, but I’m not as familiar with Firefox’s tools. I see there's a Performance tab, but I’m not sure how to interpret the flame chart, event markers, or how to pinpoint what's causing the slowness.

Can someone guide me through the process of debugging performance issues debugging performance issues in Firefox Developer Tools? Specifically:

How to profile JavaScript execution?

How to identify slow rendering or layout shifts?

Any tips for using the memory and network panels effectively?

I’m using Firefox version XX.X on [OS], and this is a React-based app.

Any tips, resources, or walkthroughs would be appreciated!

Hello! I am working on a brand new computer (i7 14700F, NVIDIA GeForce RTX 4070 Super, 32GB DDR5) with a brand new install of Firefox and sometimes it just won't load certain pages without me stopping it, refreshing, and then (most of the time) it all pops in. Browsing the web works perfectly in Edge, but in Firefox it has been a struggle. Some sites, like Discord, load VERY slowly and most of the time I need to force a refresh via shift and hitting refresh. Discord will take so long to load any image that I see it as a colorful blur before the photo fully loads in for view.

I'm running the most recent version of Windows 11, Firefox v137.0.1 (also had this issue with v137).

I have tried things in Troubleshoot Mode and didn't make a difference. I uninstalled Firefox, removed the %APPDATA%\Mozilla\ folder, and reinstalled but no change. What I haven't tried is Refresh Firefox, but that's because since Troubleshoot Mode didn't make a difference it's a bit hard to imagine Refresh Firefox will -- but if people think it's worth trying I certainly will give it a go!

I've been a FF user for as long as I can remember and I really don't want to give it up so hopefully someone can help me figure out what's going on here because I am currently at a loss and it's a big bummer.

Thanks in advance for the help!

OS: Windows 10 Pro 64-bit with all the latest Windows updates installed; running Windows version 23H2. Firefox release I'm having problems with: 137.0.2.

Just upgraded to release/version 137.0.2. The first time I open Firefox each day it takes about 2 to 3 minutes for ANY website to load. Sometimes when a web page does eventually load none of the images display.

I have tried same websites using Google Chrome AND Microsoft Edge. Websites don't have problems loading using either of those 2 browsers unless I have Firefox open in another window. If they load slowly, as soon as I close Firefox, web page load quickly in Chrome or Msoft Edge.

Not a RAM problem because I typically have around 20% of my RAM being used.

Did not have any of these problems using Firefox version 137.0.1.

UPDATE: Thought maybe it was one of my add-on/extensions so I checked for updates. Four needed updating. Made the updates and website still no loading properly.

When I try to download anything Firefox Caps my download speed at 10MB/s Other browsers don't. I tried, Edge, Chrome, Etc... they all give me access to my full Gigabit speed. I've attached 2 screenshots with a SpeedTest comparison.

Firefox: 90mbps Edge: 630mbps