We all know that browsers change more often than is really necessary. Firefox are pumping out new versions at the speed of light and with every version comes a new set of challenges. While general web browsing is often unaffected, enterprise applications designed for the web more often than not have compatibility issues with the latest and greatest browsers.
The solution – Use the Firefox Extended Support Release (“Firefox ESR” in short) version and you get to use a single version, with only bug-fixes in the updates, for 54 weeks at a time. Unfortunately, the apt repositories don’t have anything you can use to install the ESR version of Firefox (weird, especially on the LTS versions) at this stage.