Diễn đàn hỗ trợ Firefox

I've tried troubleshoot mode and the problem remains, I have no idea what I did and I've spent a good hour of research and found nothing to help with my problem, I'm at the end of my witts. The problem is most visible with google docs, but it goes beyond, like these huge lines in the corner of boxes like the one I'm typing in now (see screenshots).

Hi Mozilla team & community,

I am facing a persistent video playback issue specifically in Firefox (latest build on Windows 11), while the exact same stream plays flawlessly on Google Chrome and VLC media player.

When attempting to stream high-definition HLS live content from my media portal site (https://bidarn.com), the video stalls and buffers every 10–15 seconds. Upon inspecting the Firefox Web Developer Console (Network tab), I notice frequent `NS_ERROR_NET_TIMEOUT` errors during the loading of .ts media chunks, along with occasional CORS flags during concurrent HTTP requests.

I have already completed the following standard troubleshooting steps: 1. Disabled Enhanced Tracking Protection for the domain. 2. Started Firefox in Troubleshoot Mode (Safe Mode) with all extensions turned off. 3. Cleared all cookies, site data, and browser cache. 4. Tested with hardware acceleration toggled ON/OFF.

Unfortunately, the segment fetching latency remains high in Firefox.

Are there specific parameters in `about:config` (such as adjusting `network.http.max-persistent-connections-per-server` or expanding `media.cache_size`) that can optimize how Firefox handles parallel HLS segment fetching?

Any technical guidance or network config recommendations would be greatly appreciated.

Firefox keeps crashing/hanging on startup. Any other browser I use is fine. Been using Firefox for years and would like to keep using it. This has been going on since August, so I have not really been using it since then. Tried all the troubleshoot steps that Mozilla recommends but still crashing e.g reinstall, fresh install.

Despite re-installing Firefox sidebar is still missing (I spent 3 full days trying to fix it before re-installing). I also can't obtain another tab - I'm restricted just to the one page I'm currently using

Dear Support Team,

Greetings,

I would like to express my sincere gratitude for your excellent service and the recent update introducing the integrated VPN feature.

I am writing on behalf of myself and many users residing in Iran. As you are likely aware, our internet environment is severely restricted, with all major social media platforms and communication services being heavily filtered. Accessing the open internet is virtually impossible without a reliable VPN.

In light of these conditions, I kindly request that you consider increasing the current 50 GB monthly limit, if feasible. Even a temporary increase for users in Iran would be immensely appreciated and would significantly assist us in staying connected.

Thank you very much for your understanding and support.

Hope for a free Iran.

Warm regards

Hi. Recently I have been having issues connecting to various websites including ones that I have connected to in the past. The first one that I noticed that I could no longer connect to was The Trek (https://thetrek.co/) which I have for several years had no issue connecting to. Now it is happening with various other websites. I want to continue to be able to access the blogs etc. on their website. Thank you!

I dont want this profile feature at all it's a complete and total nuisance so I deleted the only profile it had for me but now everything but my bookmarks are gone and I need my settings restored. How do I completely disable this nuisance so I never have to see this annoying color bar in my application menu again? All my settings are destroyed now.

i have tried multiple extent ions to disable ai in the search box on Firefox an nothing works i still get ai. Again why does everyone think ai is so great. why again are people not given a choice like do you want or not want ai. HATE AI IN SAMSUNG GEMINI AND GOOGLE do not want ai anywhere ion my computer or i phone and please let me know if there is an addon or extensions in Firefox to not see it in my searches in google searches

Hi; I use Firefox on my phone and my laptop both. In my laptop (Lecoo pro 14, Ubuntu 26.04) in a domain range browser gives me security alarm and don't let me get in. This is normal but when I use other browser in my laptop or Firefox on my phone (s25 ultra) there is no problem at all and it works well! I tried all things. run commands like: sudo snap remove --purge firefox | sudo snap install firefox, sudo apt search firefox/mozilla and than reinstall all installed packages and clear all caches on settings. But none of them worked. Thanks for your responsibility and making such great open-source app.

I have had Refdesk.com as my home page for years. Firefox has now decided that it cannot find that site. Please help

Not a question just feedback but the new UI you made for the browser in the new update looks really bad and really sucks I don't know why or what anyone was thinking designing it. The blocky styles were fine before not gonna lie. :/