Firefox Community Forum

I am having a problem with a 502 Bad Gateway error which will not go away. There was originally a real problem, but it has been cleared up. I am trying to access an e-book on Libby from my local library site when the error occurs. The link works without any problem in Microsoft Edge. It used to work in Firefox as well, until the temporary problem occurred. I have clear my Firefox cache, but this has not resolved the problem. Somewhere Firefox has stored something which is creating this spurious error, but I have been unable to find it. Any suggestions would be very much appreciated.

I have an iMac and it will not log into our credit union's web site. When I goo to the log in and enter my password and such, and click on log in, nothing happens. I have a Mac Book Air with Firefox on it and it works fine. So does my wife's laptop. But my iMac doe snot work. I can use Safari to log in but not Firefox. Very annoying since I use Firefox all the time.

Running Firefox 140.3.1 ESR on Debian, lately I've been experiencing a bug when I have several instances of Firefox open, and multiple tabs open in each instance. After a few minutes of browsing and opening and closing tabs, I am unable to drag tabs to rearrange them (above the address bar). The "X" that is part of the tab also doesn't work to close the tab, and clicking the main "hamburger" menu icon (three horizontal lines) does not drop down the menu. If I switch to a different instance of Firefox that is already running, sometimes the "hamburger" menu icon starts working (sometimes not), and I am able to exit and restart Firefox, which works for awhile, and then a few minutes later the same thing happens again. Interestingly, when it's not working, I am still able to "right-click" on the tab and choose "close tab" from the drop-down menu.

I've been trying to discern a pattern, but have not been able to find a way to reliably reproduce the error. It often seems to happen when I'm using Reddit or Craigslist (maybe only more noticable because I often open and close a lot of tabs on those two sites). At one point I thought it might be related to opening a new tab for a site that had previously been opened in another Firefox window (instance), but that may be a false lead, because I haven't been able to find a way to consistently trigger the bug.

Thank you for maintaining the best privacy-respecting browser in the world, an indispensable tool for me.