Hello,

This is my very first post here.

I've been using Firefox since its very first releases.

Last year, I had switched to Firefox ESR channel, it's a more stable channel, and it doesn't get updates as often as the mainstream one.

The ESR version is designed for business, with stricter update policies.

Anyway, if you're interested, you can get the ESR version here:
https://www.mozilla.org/en-US/firefox/organizations/

or, simple google for "firefox esr"