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Question:

Question: Firefox showing black screen after Mojave update (MBP '13 Non Touch Bar 2017)

After the Mojave update Firefox is not working. It shows a black screen on launch and nothing works. Even when I open the "about Firefox" pane the dialog box that appears is black. I've uninstalled and re-installed but in vain. I've even tried installed the beta and nightly versions, but same issue on those as well. My current Firefox version : 62.0.3.

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User uploaded file

Using MBP 13 inch non Touch Bar - 2017

MacBook Pro, macOS Mojave (10.14)

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Answer:
Answer:

It is a problem with Firefox in relation to the new geek-kid "Dark Mode" ...

Open terminal and run the following command:

(and then logout)


defaults write -g NSRequiresAquaSystemAppearance -bool YES

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Oct 6, 2018 6:42 AM in response to mera_naam_joker In response to mera_naam_joker

hi mera

Thanks for using Apple Support Communities

just try to uninstall Firefox and download it again

To uninstall Firefox, follow these steps:

  1. Close Firefox (if Firefox is open): Click the Firefox menu at the top of the screen, then click Quit Firefox.
  2. Open the Applications folder in Finder.
  3. Drag the Firefox application to the Trash.

Your uninstall of Firefox is finished.

Cheers!

MAbdElaty

Oct 6, 2018 6:42 AM

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Question marked as Solved

Oct 6, 2018 9:45 PM in response to mera_naam_joker In response to mera_naam_joker

It is a problem with Firefox in relation to the new geek-kid "Dark Mode" ...

Open terminal and run the following command:

(and then logout)


defaults write -g NSRequiresAquaSystemAppearance -bool YES

Oct 6, 2018 9:45 PM

Reply Helpful (1)

Oct 8, 2018 5:05 AM in response to osx_customer In response to osx_customer

osx_customer wrote:


1493330 - Firefox shows black window and no dialog text in macOS Mojave

Thanks for the link but, according to the page the problem is unresolved, can't be reproduced and lastly, I have 5 Macs running Mojave with Firefox and Firefox Nightly and have no black screens to be found.

Oct 8, 2018 5:05 AM

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User profile for user: mera_naam_joker

Question: Firefox showing black screen after Mojave update (MBP '13 Non Touch Bar 2017)