FireFox broke my net

[chazz00]

The last update of FireFox has broken many of the sites I visit. Hardly anything works on them any longer. If I use another computer with an older version, no problems. Cannot seem to find an older version to install. Any ideas?

 

[Porni]

Cannot seem to find an older version to install

https://ftp.mozilla.org/pub/firefox/releases/