Chrome Browser?

[GaryT]

We've been told it's necessary to install Google Chrome Browser in order 
to use Adobe Flash v 11.7.  Apparently Adobe stopped development at 11.2 
and 11.7 is not available in anything other than Chrome.

Does anyone know why?  Is it absolutely true that 11.7 is not available 
elsewhere?   Any comments about it?  Will it install in Ubuntu 12.04.2 
beside FireFox 20.0 and not cause any trouble?  I'm thinking to use it 
only when I need Adobe Flash.

Comments / Help greatly appreciated
GaryT