Firefox Community Forum

I am not able to use Mozilla Firefox on my computer. It's the only browser I have been using. When I tried logging in today, I got a pop up the said: 147.0.1 is not compatible with min version 147.0, max version 147.0. Try to reinstall. I reinstalled but no luck. Please help. I need my bookmarks.

Since latest upgrade (1/16/2026) I cannot log in to Outlook email. This is specific to Firefox 147.0.1 (Chrome and Pop Peeper logins to Outlook work fine). I tried clearing cache, updating, restarting, rebooting, trouble-shooting mode, private window etc. to no avail. I get 400 error from Outlook.

I installed Firefox 147.0 using Firefox Setup 147.0.exe to D:\Programs\Mozilla firefox.

After updating Firefox to 147.0.1 via the Help menu, two Firefox entries appeared in the “Settings” app list.

Why did it become multiple?

Will the number of Firefox entries in the app list keep increasing forever with every future update?

a few days ago I received a message that i had an upgrade from Firefox. After that I can't find the bookmarks I had saved for paying bills as well as other important items.

I am getting an access denied message with shop.coop.co.uk, but not with any other online shopping site.

I have tried all the usual suggestions like reboot, clear cache, remove proxy, and I do not have VPN.

I have downloaded the html of the message, and taken a screenshot of it as shown below. Looking into the html, there are references to Incapsula, which may suggest where the problem lies?

This problem started when I had to change my Virgin Media hub from Super Hub 2 to Hub 4 around July last year.

One suggestion that is often made is to delete cookies. However it is not clear which cookies may be relevant.

Any ideas on how to identify the source of this issue will be most welcome.

Geoff

I use an iMac (2019) and MacBook (2015) but my tabs aren't syncing between the two.

I've refreshed the syncing a few times but the MacBook is still showing two lots of tabs for the iMac, and both of them are showing pages that are no longer open.

I'd really like to be able to move between the two so if anyone has any suggestions on how to get FireFox to sync, I'd be really grateful. :-)

I had to actually sign up fort a Mozilla account,the multiple hoops I had to jump through were ridicules, in order to ask a question of Firefox. I do not want my address bar to be my search engine. How do I disable the search engine in my address bar? And now I have to wait for an answer!!!!!!!! I used to love and trust Firefox. Not anymore.

In my new PC on Windows 11, I decided to install the Mozilla Firefox from the "Microsoft Store". However, unfortunately, I realized that some Add-ons (extensions) where missing from the Firefox's "Gallery of Extensions". Among them, the well known and valuable extension '"Enhancer for YouTube", which I have installed on every browser that I use. So, if I don't find a solutions for this issue, I am about uninstall the Firefox and reinstall it from Mozilla's Website..

Recently, Firefox updated and ask me to setup a profile, which I have not yet done since importing my data from google chrome in 2025. After skipping the setup, Firefox then deleted all my data and it has since been irecoverable. I have already checked the box last update that specifically said to not ask me again for setting up my profile. After the recent update, the question popped up again and now I cannot recover my original profile, all my browsing history, all my browser-saved data, and all my cookies and logins

Hi,

Looking at my Firefox 147.0.1 settings for macOS 26.2 (Apple M1), I'm trying to adjust two settings:

-- I'd like to remove Languages -> English (GB) (its existence has odd side effects, like triggering United Airlines to offer fares in Pounds Sterling, and I'd prefer to just have English (US))

-- I'd like to disable Play Audio and Video for about:welcome (in regular and private windows)

I can see no way to accomplish this currently -- why?

Thanks.

We are a high school alumni association and Firefox is used primarily for our social media sites but yesterday it started not opening our Facebook page properly - doesn't open the whole page, won't open the comments and if you click on something it just sits and spins

All of the sudden when on say a Amazon page and you LEFT click on a item description typically a page will open about that item and now it doesn't anymore. If I want to see that item, I have to RIGHT click on it and have to chose "open link in new tab" and then can see details of my item. This happens on other pages as well. I can also hold down the LEFT side of the mouse and I will see a tab open that says "we can't preview this link" and in bold text it says "visit link"

How can I get it back to working like it should. Issue is only with my laptop, my other computers work just fine.

Scott/Omaha