Install both 17 and 21 and can't set 17 as Default Browser

Greg's Avatar


19 May, 2013 03:19 AM

I have both TenFourFox 17 and 21 installed. I'd like to have 17 be the default while testing 21.

If I set 17 as default from either TenFourFox or from safari it always goes to 21.

Anyone else notice this? Is this expected behaviour?

  1. Support Staff 1 Posted by Cameron Kaiser on 19 May, 2013 06:36 AM

    Cameron Kaiser's Avatar

    Arguably, yes, I'd call this a "feature." Unfortunately, part of this involves the operating system, and I don't believe there's an easy way to fix this on my end or yours. If someone has found a workaround, I'll leave this open for them to chime in.

  2. Support Staff 2 Posted by Chris (chtrusch... on 20 May, 2013 08:45 PM

    Chris (chtrusch)'s Avatar

    I noticed the same thing. To me, this looks like a bug in Mac OS X.

  3. 3 Posted by Greg on 20 May, 2013 09:40 PM

    Greg's Avatar

    OK. On OSX 10.8 you can set either the release build (21) or the Aurora (23) as the default and everything works as expected. These install as different apps, one called Firefox and the other FirefoxAurora. THis is what I tested before reporting the issue and was able to select either on 10.8.

    I decided maybe there is something with the way 17 is an ESR release for mozilla even though it is the "release" here for TenFourFox. TenFourFox is on 17 as "release" and 21 as "Aurora/Beta/Nightly/Unstable" right now. But these builds have the same names and I have to manually append the version to the name to install both.

    So I checked Firefox using the ESR 17 (TenFourFox Stable) and the Release 21 (TenFourFox Unstable) and it results in not being able to set the ESR build as default browser even on OSX 10.8. I had to change the ESR name as FirefoxESR to install it.

    So it is something with the Mozilla ESR and Stable build installed on the same system that you can't select the ESR as default. Since this happens on OSX 10.8, seems like a Mozilla bug. Or maybe if TenFourFox was built using the "TenFourFoxAurora" name maybe it would be recognized as a different app… Of course the executable in all the 10.8 packages is still called Firefox in all the Aurora, ESR and Release for regular Firefox so maybe I'm way off.

Reply to this discussion

Internal reply

Formatting help / Preview (switch to plain text) No formatting (switch to Markdown)

Attaching KB article:


Attached Files

You can attach files up to 10MB

If you don't have an account yet, we need to confirm you're human and not a machine trying to post spam.

Keyboard shortcuts


? Show this help
ESC Blurs the current field

Comment Form

r Focus the comment reply box
^ + ↩ Submit the comment

You can use Command ⌘ instead of Control ^ on Mac

Recent Discussions

27 Sep, 2020 09:34 PM
27 Sep, 2020 01:16 AM
25 Sep, 2020 08:43 AM
21 Sep, 2020 08:35 PM
20 Sep, 2020 04:07 AM