Firefox Community Forum

It's puzzling when you ask "Why does my Gmail automatically sign out?" after setting it up in Thunderbird, especially since desktop email clients usually maintain a continuous connection. The message "You have been signed out of this account. This may have happened automatically because another user signed in from the same browser" strongly suggests a conflict, but it's typically a browser-related error, not a direct Thunderbird logout.

The most likely culprit for Thunderbird losing access to your Gmail is an authentication issue. Modern Gmail access in Thunderbird relies on OAuth2, a secure protocol. If the OAuth2 token becomes invalid or expires, or if Thunderbird's internal web component (used for the OAuth2 login pop-up) has issues like cookies being disabled, it can repeatedly prompt you for login.

Less common, but possible, are: Google's security systems detecting unusual activity and temporarily blocking access, or, if you're not using OAuth2 and have 2-Step Verification enabled, an expired or revoked App Password. While less direct, a concurrent, conflicting sign-in in a web browser using the same Google account could also contribute to Google invalidating sessions.

To resolve this, ensure your Thunderbird Gmail account is configured to use OAuth2 for both incoming (IMAP) and outgoing (SMTP) server settings. Also, verify that Thunderbird is allowed to accept cookies under its Privacy & Security settings, as this is crucial for the OAuth2 process. Removing saved passwords for the Gmail account in Thunderbird and then restarting it can force a fresh OAuth2 re-authentication.

I do not why url is not opening https://meowtroplis.com/can-cats-eat-cheese/ Anybody help please

Please fix this! I specifically set it in the settings (on Android) so that no websites open in apps. And yet it keeps asking me whether to open them! There’s no option to "don’t ask again".

Here’s an example: I have two accounts on AliExpress — one is logged into the app, the other in the web browser! And I absolutely don’t want it to open in the app, because what for???

Please fix it so that when I have it set in the settings not to open in the app, it really doesn’t open — and doesn’t keep asking like an idiot!?

Hi, I want to make a simple extension for Firefox that auto toggles vertical tab based on the aspect ratio of the Firefox window. I found `sidebar.verticalTabs` in about:config that toggles vertical tabs, but a simple googling tells me that it is not possible for web extension to modify about:config values. Is there any other API that toggle vertical tabs? Thanks!

Hi I recently installed a new webpage in Wordpress. It worked and I got the theme window on my website. I use two browser - Chrome and Fire fox. Now time for me to start installing a new "ready made" theme. It all looked good on Chrome when finished. I opened the same link in Firefox, but Firefox has not changed to the latest theme. https://condorentalpattaya.com I am totally out of clue. Removing cookies and other memory related functions does not work. I do not use Cloudflare. It works on my mobile.

??? Thanks in advance, have a nice day

Firefox has just introduced wallpapers for browser home page. I cannot get it to work. It's either cropped too small or pixilated, is there a setting I need to adjust, or a particular image format? So that it looks ok.

Firefox 141.0 update has made everything move very slow. Pages will only partially load then take several seconds to completely fill out. If you click on something, the little dot on the browser tab will be gray for several seconds and then eventually turn blue and open the page. It's like it's having to think a little bit before opening the page. Everything just seems delayed.

Hi Mozilla Support,

I'm experiencing an issue when trying to open a specific page on my website in Firefox. The page URL is: 👉 https://ihop-menus.com/ihop-secret-menu/

It either loads very slowly or sometimes gets stuck on a blank screen. I’ve tested the same page on Chrome and Edge, and it loads normally there, so the issue seems to be specific to Firefox.

Could this be related to JavaScript rendering, caching, or some browser-specific incompatibility? I’ve cleared the cache, tried private mode, and disabled add-ons, but the issue persists.

Any insights or troubleshooting tips would be appreciated!

Thanks in advance.

Since I can't comment on this: https://bugzilla.mozilla.org/show_bug.cgi?id=1976656

> This will allow websites to ensure that all of their scripts are protected with integrity data.

Anyone knows how would this help content blockers (uBO...)? We won't be able to block, redirect or modify ads and tracker scripts (including inline scripts) any more if the websites implement this?

Emergency!!! I just arrived home from a trip, and on my primary pc, I had saved say 50 tabs over a number of years. I was/am interested in syncing, but I had taken no known actionable steps to do so - but when I arrived home, my primary pc did not open the previous session. I lost everything. Spent hours trying to recover the previous session. Then, I simply decided to go back seven days and restore those tabs. Eight Hundred(!!!!!) tabs were restored, from what appears to be from each of my computers. I am now deleting the 750 unnecessary & repetitive tabs (again, on my primary computer), I am now *scared to death* to boot any of my other computers and have all of my history wiped again. WTF!!!??? Thank you very much!!!

Firefox updated today - and now half the sites won't load. Mostly I want back my Facebook and my Amazon websites.

I've cleaned out my cached and cookies and the website data with no luck. I rest my modem and router - no luck. I've rebooted the computer and still no luck. I've updated the computer - still no luck. The websites are either not loading at all or they halfway load. My Firefox was just fine before I updated it today. 

Thanks in advance Tera

Firefox has started redirecting to advertising pages after clicking on a link. Only on 1 site. The site loads but not quite correctly. Normally has information about movie ratings show up when you hover over pictures. Have to double click (double load) to get where you want. Does not do it with Edge. Used to work fine, just started.

For a couple of days now Instagram linked videos won't play here. Actually some of them will -- my own reels and anything linked with that button that looks like a movie 'clapper'. But videos that show the triangular arrow pointing to the right, nothing happens when you click. Not sure if this is a FF issue or maybe something changed at Instagram. Did a google search and nothing came up.

I find that the Firefox Browser continually goes back pages when Alt-Tab between Firefox and other applications, especially applications like Xero and even online banking.

For example, on Xero, I bring up a Profit and Loss then go the the bank transaction list with selections. Then Alt-Tab to another application like an Adobe document. Then Alt-Tab back to Firefox and it has gone right back to the Profit & Loss.

This happens continually and drives me nuts! Is there a fix for this please?

I'm using a laptop with Windows 11.

For some time now i have had issues with the browser. I get many warnings on Facebook and elsewhere that my browser is not up to date. Even the weather channel does this and now blasts me with ads , as before i had ad blockers and now I do not. I have downloaded both 16 and 32 bit Firefox for Linux several times to no avail.I need simplified help as I am not that tech savvy and it is important to me as i spend much time doing activism , signing petitions and passing on the truth. Thank you in advance