This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

How I will know the version of Firefox I am using on my laptop (Windows 7) ?

  • 2 replies
  • 2 have this problem
  • 3 views
  • Last reply by cor-el

rakeshfire
rakeshfire
more options

1. Need to know the version which is installed on my laptop, I am using Windows 7 2. Also, wanted to know whether I can have 2 or 3 version of firefox on my laptop as I have do test an application to see whether it works on older version of firefox. or Need your input so that I can test my application.

1. Need to know the version which is installed on my laptop, I am using Windows 7 2. Also, wanted to know whether I can have 2 or 3 version of firefox on my laptop as I have do test an application to see whether it works on older version of firefox. or Need your input so that I can test my application.

All Replies (2)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
more options

When Firefox is open, you can use

Help > About Firefox

to see what version you're running. Your Firefox reported to this site that it is Firefox 13, which is obsolete and vulnerable, so you should check this at your earliest convenience. That dialog also has an update button.

If you want to maintain older versions of Firefox for testing, you could use a "Portable" version built by an independent third party. Although a Portable version still cannot easily run simultaneously with your main install, it will have its own settings folder, so you can carefully control your test environment(s).

http://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C%20Portable%20Ed./

That said, most people run the latest version of Firefox unless support was terminated for their OS. There probably are statistics on that somewhere.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can install multiple Firefox versions via a custom install in different installation folders.

If you want to test future development versions:

See also (Older versions):

Do a custom install and install each version in its own program folder to use multiple Firefox versions.

Make sure not to start Firefox after the installation has finished.
Create a new profile exclusively for each Firefox version.
Create a desktop shortcut with -P "profile" appended to the target to launch each Firefox version with its own profile.

Use the -no-remote command line switch to open another Firefox instance with its own profile and to run different Firefox instances simultaneously, but do not use this with the default browser and the default profile.

Modified by cor-el