Firefox only shows a page that says XML Parsing Error: undefined entity Location: chrome: //browser/content/browser.xul. So I can't use any fix that uses ffox
After I first got the message I uninstalled Ffox and reinstalled it. Same message. So I can't get to any ffox menu, or buttons because I only have the one page with the message.
One suggestion was to uninstall and delete "firefox program file" but I can't find any file with that name on the C drive Mozilla Firefox folders
What can I do?
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Did you verify that all additional language packs you have installed are updated to the current Firefox release?
- about:addons page : Languages
Try to start Firefox once with the -purgecaches command line switch (make sure that Firefox is closed).
Final solution. Start Firefox holding the <shift> key (safe mode). Press <ctrl><shift>A then chose languages. Remove or disable all languages. Restart Firefox normally
01/11/2019 : Cor-El and Alberto,
Thank you for your contributions, but I think they relate to my earlier post (25/10/2019). The total uninstall and re-install I did on 30/10/2019 restored Firefox to proper working order.