Firefox Support Forum

For some reason today I started having issues with thumbnails not loading for youtube videos. I logged out of my google account and went to log back in, but whenever I try to login to my google account now I get a 400 error. I can login fine on other browsers and other devices. I have tried the following troubleshooting steps:

cleared all cache and cookies flushed DNS created a new firefox profile in about:profiles and set it as default Re-installed firefox multiple times refreshed firefox used Revo Uninstaller to fully remove all traces from firefox and reinstalled Manually removed all traces of firefox from appdata and program folder and installed the beta version Ran windows updates and rebooted ran an SFC scan Ran a DISM online restorehealth

Every single time I get the same result, 400 error when trying to log into my google account. Starting to feel like I'm loosing my mind here. Any troubleshooting ideas would be very appreciated. Thanks in advance!

Recently I got a Mac computer and I installed Firefox in it. I can't find "About Firefox" in Application Menu.

How to show it in Application Menu like Windows and Linux?

Firefox Developer Edition does not allow to sign in to few particular websites. Whenever I click sign in/up button, the webpage first tries to connect me to the log in/up page (for example Firefox pocket, Bing, any Microsoft websites, any government websites) but after few seconds it just redirects to the page where I was, i.e, it just refreshes the page. I tried to get help from available forums in Mozilla support (for example, using troubleshoot mode), but nothing is effective. As an example I am attaching few screenshots while trying to sign in to Bing using troubleshoot mode.

Hello, Having a little difficulty with which I am hoping someone might assist. My primary PC has died on me, and I am making attempt at transferring my life over to another for temporary use. I have installed Firefox as it was my primary browser on this now-dead PC and logged in to my Firefox account; however the bookmarks in this browser are very old. How might I go about accessing the latest version of all my bookmarks, that were on the now-dead PC (or are they only backed up very infrequently)? Any information is appreciated! Thank you

Greetings, After updating to 113.0 the height of my tabs has doubled, with the text size remaining the same. When visiting certain sites, such as Facebook, a horizontal black line appears when the tab is selected, dividing the tab and the text within in half. I have spent a few hours Googling and I haven't found any solutions to fix this. I've tried several different settings in about:config, I've enabled compact mode, just about everything I could find short of modifying code which I would rather not do. It's useful space for me and I'm hoping for a fix. Thanks for Your Time, Thomas

How do I fix this? When I attempt to go to this site on my iMac using DuckDuckGo VPN on Mozilla FireFox, ( https://www.bible.com/ )-- I get this: "Application error: a client-side exception has occurred (see the browser console for more information)."

My Dashlane 14 day login stopped working a few days ago even though I check the box to stay logged in for 14 days every time I login. I looked at a previous solution posted 2 years ago by Mozilla but my settings do not have the delete cookies or clear history checked when closing Firefox. Any suggestions??

Hi, about 40 minutes ago my laptop decided to turn off and upon restart firefox openned a session from 2 months ago. ive tryed following everything i could find but still cant recover this session. I have a upgrade.jsonlz4 from the time backed up but it wont open that session. Any way to recover it?

I have a secondary email address but it does not appear on my account. I need to change my primary email address. I try to type in the secondary address and it is rejected as"already exists". So I cannot proceed . Help!

I cant get any sound on firefox for desktop im using a windows 11 laptop. I have checked all windows settings and every app expect firefox has sound. please help thanks.

I have honestly no idea why you guys don't have an option to be able to put the tabs bellow the address bar like in the old versions of firefox. I used the userchrome.css for a long time to place the tabs back on the bottom of the address bar and at the minimum once a year you guys break the program. Is it so hard to program a switch or something to place the tabs on the bottom?

bold text i must get into my online bank account with bank of america using my yahoo.com sonce you are blocking it. & i cannot change it

I used to have my Bookmarks toolbar visible. It worked fine until the latest update today. Now it's gone. I've set it to show Bookmarks toolbar. Tried turning it on and off. Doesn't work. Here's a snapshot of it. Just below that last line is a list of my bookmarks on the toolbar. The bookmarks are still there. It's the toolbar that has disappeared.