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Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

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New User

Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Hi, the keyboard shortcut cmd+shift+m works for most of my other applications, and it's listed in the Window menu item, but it's not working in Firefox. I should note that cmd+m does work to minimize the window. Also, clicking on the Zoom menu item works as intended, just not the keyboard shortcut.

Could use some advice. Thanks. Smiley Happy

Mac OS X Mountain Lion with FF 17.0.1

10 REPLIES
Expert User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Hi drewdavid,

I am not sure that I understand your question correctly, but if you wish to zoom in and out of the webpages in Firefox, please try the following shortcuts:

  • Cmd + '+' for zooming in
  • Cmd + '-' for zooming out
  • Cmd + '0' for resetting the zoom

I hope this helps. Thanks!! - Ralph

New User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Hi and thanks for the reply.

Not referring to zooming within the browser, but rather maximizing the window to occupy the entire screen (not full screen view). I'm talking about the keyboard shortcut that corresponds to clicking on the green plus button in the top left of the window.

cmd+shift+m works for most Mac OS X applications, but not Firefox. Should this be submitted as a bug?

Again, clicking on the menu item Window and then Zoom works as intended, it seems that it's just the keyboard shortcut that is defunct.

Thanks I hope I was more clear this time. Smiley Happy

Site Moderator

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Command + Shift + M is currently assigned to one of the web developer features.

Responsive Design View: command + shift + M

You can try to disable this feature by toggling the devtools.responsiveUI.enabled to false on the about:config page to see if that makes the shortcut work for the window zoom.

You may need to quit and restart Firefox to make the change effective.

New User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

I have the same problem and the solution provided doesn't solve the problem. On OSX you can assign any shortcut to any menu item through the Keyboard Preferences. Window\Zoom was assigned to Shift-Command-M, but I tried several other ones that I'm sure FF doesn't use for anything else.

When I press the shortcut, the Window menu-item lights up, which means it is recognized. But the browser window doesn't zoom.

Expert User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Hi Richieman and Drewdavid,

I was able to replicate this issue even after creating a unique shortcut (Cmd+Shift+Ctrl+M), so I opened a bug to track this issue:

https://bugzilla.mozilla.org/show_bug.cgi?id=827652

Thanks so much for your reports!

- Ralph

New User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Thanks Ralph Smiley Happy

New User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

As a work-around I created a QuickSilver trigger calling the MaximizeFrontWindow script. Seems to work fine.

New User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Ralph, I've got two other issues. They are very related to this issue so I'm posting it here in the same Article, I hope that is ok.

The same problem occurs with the "Preferences..." shortcut. It is normally assigned to Command+, (comma). This also shows in the Firefox menu as such. When I depress the keys, The Firefox window lights up but no Preferences window appears. Instead, the text zooms out (same as Command-Minus. Again I reconfigured the shortcut through the Keyboard Preferences to something FF isn't using. The new shortcut doesn't show the Preferences, neither does it Zoom-out. The Firefox menu does light-up. The Command-Minus shortcut still zooms out, and no menuitem lights up.

New User

Re: Window Zoom Keyboard Shortcut Not Working (cmd+shift+m) Mac OS X

Another problem has to do with the Shortcuts that are set to HTML elements with the "accesskey" attribute. For example if you go to this page:

http://en.wikipedia.org/wiki/Wikipedia:Keyboard_shortcuts

If you hoover over the "Edit" tab at the top, you'll see a tooltip telling you that you can press "Control+Option+E" to edit the page. If you do that, it works fine, now you are in Edit mode.

On the edit page, scroll down and hoover over the "Preview" button at the bottom, you'll see that the shortcut is "Control+Option+P".

Now comes the problem. Click somewhere in the textarea and press the Preview shortcut. Nothing happens.

Now click on the input box below "Edit summary" and press the shortcut. Again nothing happens.

Now click on text outside of the edit boxes. Press the shortcut. Now it works. You'll also notice that the shortcut actually inserted some special character  (it shows as a diamond with a question mark) that now shows up in the preview.

Are you able to reproduce these issues?