Do Nightly or beta releases overwrite existing installations, or are they independent and can exist together on one PC?
I am interesting in testing the stability of the shumway (HTML5 based) renderer, but do not want to risk blowing away release 25. If the Nightly release can coexist with the most current (stable) version that will make things easier.
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Hello MichaelGH, see the-edmeister's Installing and running multiple versions of Firefox.
thank you
Note that you can install Shumway as an extension in current Firefox 24+ releases.
You do not need a possibly unstable Nightly build.
Do a custom install and install each version in its own program folder to use multiple Firefox versions.
- https://support.mozilla.com/kb/Custom+installation+of+Firefox+on+Windows
- http://www.mozilla.org/en-US/firefox/channel/
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.
See also these mozillaZine KB articles for information: