To understand it more clearly, let’s check the installed version of Firefox through default installation in Ubuntu 16.04 and Ubuntu 17.10.
In version 16.04, Ubuntu used Firefox version 54.0 as default browser.
Firefox and Ubuntu both use different update and release cycle.
Due to this difference, there is always a chance of getting an older version of Firefox through default installation.
Type the password of that account when it asks for authentication.
Known security bugs in older version may lure hackers in breaking the system security.
To minimize the security risk, Firefox should be kept up to date.
Before we learn how to update the Firefox in Ubuntu, let me answer a common question which I frequently receive from users while I suggest them to update the Firefox.
So if we get an older version of Firefox through default installation of Ubuntu, it’s not the Ubuntu who used an older version, its Firefox who made that version older by releasing the new version.
Firefox is installed as a core extension in Ubuntu.