If this ESR 45.x version of Mozilla Firefox disables any FF plugins and extensions you were using, or any plugins you were using with your older Safari,I whole heartedly recommend that you use the two versions of Firefox together, but only use the plugins functional one only when you need to use it. You can use this version now OR you'll have to switch to the ESR version before the end of Dec 2016 as Mozilla won't offer this version after Dec 2016. The ESR version 45 of Mozilla Firefox is still completely secure. Mozilla will issues ESR (security) updates to OS X10.6-10.8 for the version 45 of Firefox, but will not get ANY new web browser functionality feature updates. Mozilla will keep issuing security updates for Firefox in the form of their Firefox ESR web browser (Extended Security Release web browser program, vers.

Ignore all the enteprise and educational info.

Can also switch, before end of 2016, to Firefox ESR 45.6 version here.