I'm sure I'm not the only person who has Chrome installed as a backup, just in case I run across a site that doesn't work right in Firefox, or if I just suspect

I'm sure I'm not the only person who has Chrome installed as a backup, just in case I run across a site that doesn't work right in Firefox, or if I just suspect such a problem exists. Having an alternate browser installed is trivial; it's not like using a different OS.