Firefox error message

Gers

When I try to access Firefox this morning this message pops up.  All was OK last night. I'm now using Chrome. 
Any ideas what this is please? And how to solve it.
thanks

oldernonethewiser

You been through the fix suggested here?

https://support.mozilla.org/en-US/kb/firefox-wont-start-find-solutions

Specifically:-

XULRunner - Error

If you see the message, "XULRunner - Error: Platform version <x.x.x.x> is not compatible with minVersion <x.x.x.x>"" ("<x.x.x.x>" depends on version number) after a Firefox update, use another browser to download the Firefox installer from the Firefox download page, save it to the desktop or other location, remove the Firefox program from your computer and then reinstall Firefox (see the instructions here for details).

Gers

oldernonethewiser said:

You been through the fix suggested here?

https://support.mozilla.org/en-US/kb/firefox-wont-start-find-solutions

Specifically:-

XULRunner - Error

If you see the message, "XULRunner - Error: Platform version <x.x.x.x> is not compatible with minVersion <x.x.x.x>"" ("<x.x.x.x>" depends on version number) after a Firefox update, use another browser to download the Firefox installer from the Firefox download page, save it to the desktop or other location, remove the Firefox program from your computer and then reinstall Firefox (see the instructions here for details).

No, hadn't seen that.  Thanks, I will do it!

Gers

Well, I downloaded Firefox again and it all worked. Thank you.

oldernonethewiser

Glad you got it sorted.

FF is my browser of choice.