Firefox has standard defaults hotkeys for the keyboard and those can't be changed unless one uses a 3rd party app to change those settings.

https://support.mozilla.org/en-US/kb/keyboard-shortcuts-firefox-ios

Or, to say that differently, you created a new shortcut in your keyboard software, but you did NOT block the ⌘+J shortcut from passing through to Firefox. Maybe that is also possible in your keyboard software?

Firefox has standard defaults hotkeys for the keyboard and those can't be changed unless one uses a 3rd party app to change those settings. https://support.mozilla.org/en-US/kb/keyboard-shortcuts-firefox-ios

That article is for Firefox for iOS (iPhone/iPad) as the article for (desktop) Firefox for macOS it is https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perform-firefox-tasks-quickly

Or, to say that differently, you created a new shortcut in your keyboard software, but you did NOT block the ⌘+J shortcut from passing through to Firefox. Maybe that is also possible in your keyboard software?

AFAIK under macOS the way to "block" the original shortcut is to remap that to something else.

Firefox has standard defaults hotkeys for the keyboard and those can't be changed unless one uses a 3rd party app to change those settings. https://support.mozilla.org/en-US/kb/keyboard-shortcuts-firefox-ios

This is kind of disappointing, since then Firefox is not working the same way as regular macOS apps. :(

jscher2000 - Support Volunteer said

Or, to say that differently, you created a new shortcut in your keyboard software, but you did NOT block the ⌘+J shortcut from passing through to Firefox. Maybe that is also possible in your keyboard software?

AFAIK under macOS the way to "block" the original shortcut is to remap that to something else.

I'm not sure I'm reading it correctly, but it doesn't look to me like you remapped the ⌘+J shortcut to something else. What do you want ⌘+J to do instead of opening Downloads? Can you remap ⌘+J to Shift+J or whatever you want Firefox to receive when you press that combination accidentally?

I'm not sure I'm reading it correctly, but it doesn't look to me like you remapped the ⌘+J shortcut to something else. What do you want ⌘+J to do instead of opening Downloads? Can you remap ⌘+J to Shift+J or whatever you want Firefox to receive when you press that combination accidentally?

I've attached two screenshots that proves that I remapped the ⌘+J to ^+⌘+J to avoid th accidental Downloads tool opening.

As you can see from the second screenshot that the mapping went through and the new shortcut to open Downloads is the assigned ^+⌘+J, but the ⌘+J still works for some reason.

Can you remap ⌘+J to Shift+J or whatever you want Firefox to receive when you press that combination accidentally?

No really, I don't want to have anything on ⌘+J.

I am a Windows user, so I can't test this and can only give you my interpretation based on what I see. Your Mac has a new system level mapping for

^+⌘+J => Downloads

which is a duplicate of what ⌘+J already does.

⌘+J is not affected by creating a duplicate mapping.

I am a Windows user, so I can't test this and can only give you my interpretation based on what I see.

You are actually right. I just thought that assigning a new shortcut would disable the previous, but that is not the case and the previous shortcut keeps working in other applications as well. That is a bummer!

You are actually right. I just thought that assigning a new shortcut would disable the previous, but that is not the case and the previous shortcut keeps working in other applications as well. That is a bummer!

Actually, I am not completely stupid. Apple changed the behavior, it worked like that before.

https://www.youtube.com/watch?v=hHKbw1taBSI

Thank you for the video reference. You might add a comment asking how to make it work in Firefox and see whether he knows a trick for that.