Firefox Community Forum

Hello,

I am experiencing an issue with Firefox where some websites display a message saying that the internet connection cannot be established and that I am offline, even though I am connected to the internet.

My internet connection is working normally. Other websites load without problems, and the same websites also work correctly in other browsers such as Google Chrome.

However, in Firefox certain sites do not load. For example, YouTube and YouTube Music show an error message indicating that I am offline. I have also noticed this issue on a few other websites.

Because the same pages work normally in other browsers, it seems to be related specifically to Firefox.

Could you please help me understand what might be causing this issue or how I can fix it?

Thank you.

Updated and lost everything in my browser and now is complete crap, no bookmarks, and it install google as a search engine that doesn't work. Can you help me rollback to the version that worked just fine? Searched help and didn't find a way to resolve problem.

Thank You,

James Johnson

I use Firefox on a Mac to access Brightspace for my classes. I also use Grammarly. When copying text from the Grammarly widgets and pasting it into the Brightspace HTML editor, the text is stripped of hard returns, causing paragraphs to collapse without any breaks between them.

I have tried pasting as unformatted text, and the issue persists. This issue does not occur in Chrome, so I suspect it is due to how Firefox handles clipboard data. I have not found a workaround or resolution for this.

My virus software [ESET] continues to throw a warning for this site: https://smartadblock.net/febc/check.php, whether in FireFox or not.

The full message is this:

03/05/2026 12:34:31 PM;HTTP filter;file;https://smartadblock.net/febc/check.php?smarterBlockeruser=5a95aca1-0bc7-44aa-8530-b24c4663d295&smarterBlockerch=75779&smarterBlockerclck=KYYhsXKkLAiq86nMniI_QBbvIGZ_3n5L;JS/Redirector.SWD trojan;connection terminated;TRANZFORMATION\wally;Event occurred during an attempt to access the web by the application: C:\Program Files\Mozilla Firefox\firefox.exe (83D3842D579E5B6E2E5B055CCA4FB90933489C28).;08C31D6E8BB70C29570A45FB6BCACD9881E3C0DF;;S-1-5-21-500642325-2770745265-1048253706-1001;

This just started yesterday 3/4/2026

Can someone advise me on this?

Normally Ctrl+Shift+T reopens the last tab I closed in that specific window, but after the most recent update it reopens the last tab I closed in /any/ window. Is this happening to anyone else?