Web BrowsersFirefox
Mozilla Firefox is the second most popular web net net app on the Internet afterGoogle Chrome.
Although popular, many people ask what version of Firefox do I have on my system?
This article will explain how to find the Firefox version easily.

We will discuss two ways to do so.
At first, the only version of Firefox available was 32-bit.
The 64-bit version was a fork of Firefox called WaterFox.

But now Firefox also comes with a 64-bit variant.
If you have a 64-bit system, it is always recommended to load the 64-bit software.
This improves compatibility and performance.

Im discussing this first because you will need this information while running command-line version number check.
Lets discuss both ways in detail one by one.
There are two ways to find the version of Firefox installed using the graphical user interface.

Both these methods can be used for almost all Operating Systems including Windows, Linux, and Mac.
From there, you might go toHelp > About Firefox.
The shortcut to open this dialog box isAlt + H A.

Another benefit of opening the About dialog is that Firefox will automatically check for updates.
This makes sure that your Firefox is up to date.
If its not up to date, it will download the latest version and automatically update Firefox.

These download and installation are completely automatic.
You just have to kickstart your internet tool for the new version to start functioning.
Here is the step by step information:
The -v switch does not work standalone in Windows.

You have to combine it with any redirection switch.
That is why I have added |more switch at the end of the command.
If you run firefox -v, it will give a blank output.
This is abug in Firefoxwhich has not been fixed yet.
Firefox also provides a lot of command-line switches which it’s possible for you to use at your advantage.
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source: www.itechtics.com