Firefox Community Forum

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.

All of a sudden, starting today, I cannot view video clips. IK get and error message "No video with supported format and MIME type found. Is there a way to fix this or do I have to reinstall my computer from scratch?

I´m currently working on some courses in Udemy and all of a sudden the videos are not loading, is not my internet connection I deactivated all the extension to see if it was the case but nothing seems to be working

I often receive a 403 error when using Firefox Every time, before this happens, I get the unsafe website warning and then the 403 error when I continue anyway

I am using the latest version at the time of writing These errors only occur on my desktop PC I have tried to replicate this issue on both my phone (Android) and another laptop(Windows 11) but all the websites work normally on there.

I have tried the following, none of which have any effect:

• Clearing cookies
• using Troubleshoot mode
• Restarting
• Changing Useragent
• Using "Forget about this site"

The following do fix the issue

• Using a VPN
• Using Google Chrome
• Running Firefox in another profile

Going through the privacy and security tab and reseting all the settings sometimes works but only temporarily

The following are a few websites where the issue occurs

1. https://kdice.com/
2. https://latinitium.com/
3. https://theysaidso.com/
4. https://opensource.org/
5. httpe://obsidian.rocks/

Unable to find list of blocked email addresses. Went to "settings" / "Security & Privacy". No luck. I have no problem in deleting addresses. UNBLOCKING is eluding me.

When I send an email using Gmail, Firefox stores a copy in "Sent Mail", another copy in "Sent", and another copy in "All mail" . Why is this and how can I stop this? Or how can I delete two of the duplicated storage locations? Thank you

For two days I have been unable to access the internet using my default Mozilla Firefox browser. I have used Mozilla as my default browser for many years with no problems, but have had to use alternative browsers not only to access my emails on Outlook, as well as other nominal sites, but even to sign into my Mozilla account, I had to use Microsoft Edge browser. I have made no changes to my settings or internet security. Please advise. Thankyou

I'm not able to solve this issue.

Financial chart does not load it keeps buffering. The same is true for twitch but videos on youtube work fine.

I'm thankful if you could help me with this one.

Is it possible to restore firefox to a previous version to recover all my data? After update, all my firefox pages, tabs, bookmarks and history have vanished. Please help me recover or restore. Thank you!

Hello! Due to work reasons, we need to use Fiirefox 54.0.1 (64) and do not need to upgrade But When open the webpage https://www.alibaba.com/ , the login icon on the right cannot appear I searched carefully online but couldn't find a solution Please provide a solution Can you provide an email address? I can take a screenshot to illustrate the situation My email address bestfinder@foxmail.com thank you HALE