Why is firefox running on an old version?

Question

Mozilla Firefox

Good afternoon!
I noticed that some services think that I have an old browser.
And for sure, blah, I went to 2ip and he says that I have firefox 56.0, although now it's 84.0.
Even mail.ru says that I can only work in his "light mail" - I can't handle heavy mail.
And if you go to the properties of the program - he says that the newest.

Where to start solving the problem? It seems that there are no launch options for the shortcut to launch the "shaggy version" ..
Maybe in the firefox settings what?
Thank you!

Answer 1

First, restart the browser without extensions (item in the help menu). If after that the sites began to show the correct version, then look for a bad extension.
If that doesn't help, look in about:config for something containing the string 56.0. Most likely it is general.useragent.override
https://support.mozilla.org/en-US/kb/how-reset-def...