Firefox Support Forum

I have been receiving the following error code 'PR_END_OF_FILE_ERROR' on several website on my Firefox browser. Sometime, not all the time, I get the same error message while trying to use YouTube, while other times the site loads but says that I am offline and no internet connection. I have done all of the fixes that they say to use online and nothing seems to work. YouTube will occasionally work but none of the thumbnails will show up. Then there are other site that work fine.

I've lost all my open tabs....and I can see them in history, but when I open any historical item,...it loads it over the top of the only open tab I now have...as a result I only have one tab. Its a mess what have you done?

When I try to use youtube.com on Firefox I have problems with the page loading correctly. The sidebar menu doesn't populate leaving only a white space where all the options should be. When I click on a video a red progress bar will fill about 75% of the way and then just hang and the video will never load.

I have tried clearing my cache and cookies, deleting all data, refreshing my browser at least 5 times and ran under troubleshooting (safe) mode but the same issue persists.

This does NOT happen under Edge at all, only with Firefox.

Hello all. I'd like to restore the backspace button function but the previously workable solution — resetting browser. backspace_action to 0 — is not working for me. Any hints as to why that might be the case?

I'm having an issue with Fidelity Investments website logging me off after 5-10 minutes of inactivity. Before Fidelity's website redesign, I could go at least 30 minutes or more without having to login again. It seems now I have to login constantly.

I have contacted Fidelity, but the said it was a Firefox issue, however, I cannot find any information about this issue (or I don't know where to look).

How do I extend the time before needing to login again? Thoughts on if is this even a Firefox issue or is it Fidelity's website?

Thank you!

Thanks guys for screwing up my day with your latest update. I used to be able to download a .pdf and opening it in my ,pdf reader. I NEED to do this for tax reconciliation purposes. Now your crappy program has decided to open .pdfs in itself and I cant get a downloaded copy any more. What the hell was the programmer thinking? Yes I have gone to Applications and checked that it is set to my .pdf reader. Please fix this before I get fined by the tax office.

For the past few days, when I try to log on to PlayStation on Firefox, the sign-in page sits on a loading swirl after inputting email. There's a clear memory leak shown on Task Manager. The menu bar's right-click doesn't draw properly. FF can't be closed and needs to be terminated. The only extension I have is uBlock Origin disabled for this site.

This website works on Edge.

Attached is the broken menu from right-clicking the menu bar.

I have been using firefox mozilla to access our company EPM system for 3 years. It has been working fine but lately after I installed the latest firefox mozilla version, the horizontal scroll bar disappear in search results in the EPM system.

This did not happen when I use google chrome to access the system or Edge. It is clearly Firefox mozilla issue. Nothing is set in my preferences to make scroll bar disappear.

When I open firefox it opens on the "success" page it should open on my selected page Yahoo.com

this happened after I ran the "refresh firefox" option

Hi,

I use Firefox Developer Edition as my default testing browser. I have it set up to clear the cookies and site data when Firefox is closed. For my normal browsing I use regular Firefox (currently version 120.0). I was looking through the settings on 121.0 beta Firefox Beta November 21, 2023 and saw it has the very useful Cookie Banner Blocker: When a site asks if they can use cookies in private browsing mode, Firefox Developer Edition automatically refuses for you. Only on supported sites.

According to the https://support.mozilla.org/en-US/kb/cookie-banner-reduction?as=u&utm_source=inproduct this was introduced in Firefox version 120. However I do not see it in my regular Firefox 120.0. Both browsers say that "Your browser is being managed by your organization." I can change the proxy settings in regular Firefox 120, but not in Firefox Developer beta 121. Although both have the same sentinelone 2023.1.4.650 extension set.

I have attempted to follow published instructions on how to manage extensions but the steps described are completely wrong. When I click the extensions icon, it opens the add-ons tab (does not present a list of extensions). There is no "gear" next to any of my extensions; just the on/off button and the .... button.

How can I force an extension to show on the toolbar?

Firefox is up to date (version 120.0).

Hi, I just discovered something odd. Trying to troubleshoot something with an android app communicating via web and laptop to free up the phone, and the relevant website has a chat popup and Firefox won't open the popup. I added the website to the whitelist and saved, but still wouldn't. Tried troubleshooting mode, but nothing. Switched to Chrome and it works fine. Cleared cookies and cache and restarted Firefox, but still no luck. The website is ExpressVPN.com. Macbook Pro OS10.14, Firefox up to date, version 115.1.0esr (64-bit).

I find that OneNote Web Clipper extension is not available for Firefox now. I'm sure it used to be. Why is it not available and is there a workaround to be able to use it still in FF? Windows 11.