If your website only works on Chrome it doesn't work.
@brian_gettler how about if it works on chrome, chromium and edge, does that count 😜
@brian_gettler @david_chisnall And they probably didn’t live through the horrors of everything running on Internet Explorer.

@brian_gettler If you website...
- Only works on chrome
- ...if you clear your cache....
- ...and cookies...
- ...and try entering incognito mode...
- ...and disable adblock...
- ...and turn off your VPN...

You have a circus, not a website.

What are the exact technical reasons for this? Some non-standard rendering of js or library usage? Ive always wondered abt that but Im not that deep into the topic ig..

Edit:
I think a few minutes of searching helps. Seems to be the rendering as a whole, extensions and non-standard implementations for stuff.

https://support.mozilla.org/en-US/kb/websites-look-wrong-or-appear-differently
https://kb.mozillazine.org/Websites_look_wrong

Websites look wrong or appear differently than they should | Firefox Help

This article explains how to fix problems with websites that display incorrectly in Firefox or don't work the way they should.