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Why I can't use both "normal" firefox and firefox developers edition same time anymore?

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Hello, after new Firefox updates I can't use both Firefox editions at same time anymore. This is not good feature because I'm used to use both editions at same time when coding different softwares. Could you change this back, please?

Best regards, Pasi Nissinen

Hello, after new Firefox updates I can't use both Firefox editions at same time anymore. This is not good feature because I'm used to use both editions at same time when coding different softwares. Could you change this back, please? Best regards, Pasi Nissinen

Additional System Details

Installed Plug-ins

  • Shockwave Flash 31.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0

More Information

Wesley Branton
  • Top 10 Contributor
580 solutions 4951 answers

I just tested and there are no issues with running Firefox and Firefox Developer Edition at the same time.

You should check that you have the option to do so enabled in your settings. Go to the General tab of the Firefox Developer Edition settings page and ensure that the Allow Firefox Developer Edition and Firefox to run at the same time option is enabled.

Firefox Developer Edition runs on a separate profile from Firefox, so there should be no issues running the two side-by-side or testing things in Firefox Developer Edition without impacting your regular Firefox installation.

NOTE: You will be prompted to restart Firefox if you change this setting.
I just tested and there are no issues with running Firefox and Firefox Developer Edition at the same time. You should check that you have the option to do so enabled in your settings. Go to the General tab of the Firefox Developer Edition settings page and ensure that the ''Allow Firefox Developer Edition and Firefox to run at the same time'' option is enabled. Firefox Developer Edition runs on a separate profile from Firefox, so there should be no issues running the two side-by-side or testing things in Firefox Developer Edition without impacting your regular Firefox installation. <blockquote>'''NOTE:''' You will be prompted to restart Firefox if you change this setting.</blockquote>

Question owner

Hello Wesley, Thank you for you answer. That's how it worked for me as well for few days ago. But after new update on Firefox developer I get message (linked picture 1) and I have to close another Firefox first.

Second picture indicates that I have enabled option "run at the same time".

So something funny is happened here.

Best regards, Pasi Nissinen

Hello Wesley, Thank you for you answer. That's how it worked for me as well for few days ago. But after new update on Firefox developer I get message (linked picture 1) and I have to close another Firefox first. Second picture indicates that I have enabled option "run at the same time". So something funny is happened here. Best regards, Pasi Nissinen
Wesley Branton
  • Top 10 Contributor
580 solutions 4951 answers

If you are accessing Firefox Developer Edition from a shortcut from your Windows desktop, try changing the target of that shortcut to:

"{PATH TO FIREFOX DEVELOPER EDITION}" -no-remote

See if that allows you to open both Firefox Developer Edition and Firefox at the same time.

If not, try reinstalling Firefox Developer Edition to ensure that nothing in the installation is damaged from the update.

If you are accessing Firefox Developer Edition from a shortcut from your Windows desktop, try changing the target of that shortcut to: <code>"{PATH TO FIREFOX DEVELOPER EDITION}" -no-remote</code> See if that allows you to open both Firefox Developer Edition and Firefox at the same time. If not, try reinstalling Firefox Developer Edition to ensure that nothing in the installation is damaged from the update.

Question owner

Hello Wesley, thank you for you answer and help. But it didn't help solve the problem. I tried to reinstall both Firefox and Firefox Developer Edition and change the shortcut, but no change.

I guess I have to live with it. :)

Hello Wesley, thank you for you answer and help. But it didn't help solve the problem. I tried to reinstall both Firefox and Firefox Developer Edition and change the shortcut, but no change. I guess I have to live with it. :)
cor-el
  • Top 10 Contributor
  • Moderator
17416 solutions 157348 answers

Does it has effect if you add the "-no-remote" switch to the command line of either shortcut?

Does it has effect if you add the "-no-remote" switch to the command line of either shortcut? *https://developer.mozilla.org/en-US/Command_Line_Options
raggatah 0 solutions 1 answers

I have the same problem on macOS Mojave 10.14.1 and my option is enabled.This is happening for some time now.Also when I close the one and open the another it restores the same session and this was not how it used to be.

Thanks.

I have the same problem on macOS Mojave 10.14.1 and my option is enabled.This is happening for some time now.Also when I close the one and open the another it restores the same session and this was not how it used to be. Thanks.