Fórum podpory Firefox

I cant open Firefox - screen/ window comes up with message: Firefox can't find the file at jar:file:///Applications/Firefox.app/Contents/Resources/browser/omni.ja!/chrome/en-GB/locale/branding/browserconfig.properties.

How do I get back to a usual opening of firefox?

Today I was forced to erase my hard disk and reinstate / reinstall the entire operating system on my MacBook Pro [from my back-up] ... in doing so I was upgraded to Firefox v94 [from Firefox v92] and all my bookmarks and folders and my reading list were lost ... btw I had no option, no alternative was offered ...

Is there some way of salvaging the bookmarks, folders and reading list from v92 and importing them to v94?

I thank you kindly in advance for your advice

Using Firefox, I am unable to share articles from The New Yorker's website to Facebook on my IMac. I get an error message that reads: "App Not Setup: This app is still in development mode, and you don't have access to it. Switch to a registered test user or ask an app admin. for permissions." I do not get this error message when I use Safari, only Firefox. There is no administrator as this is a home device, so what do I have to do on my Firefox settings to access permission?

I'm on a Mac, running the latest version of Firefox. Recently I've had some work to do that meant I wanted to keep multiple tabs open, so I changed my settings to 'restore previous session' so I'd get my tabs back when I turned my computer off/on.

For a few days all was going well, then Firefox crashed. I managed to get it back up again and change the setting so it wasn't trying to restore multiple tabs. But since then no luck, Firefox opens but I get the spinning wheel curser and Firefox shows as non-responsive, I have to force quit the app.

I've tried uninstalling it, still no luck. I'm writing this from Google Chrome.

Can anyone help? I much prefer Firefox, but it's currently unusable for me, and as the browser freezers I can't get into any of the settings etc.