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How to Work Offline with Firefox 89?

  • 5 replies
  • 1 has this problem
  • Last reply by Seburo

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Used to be so easy to access. How do I work offline in Firefox version 89? I'm not seeing it in the dev tools.

All Replies (5)

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I should be able to help with this.

If you press F12, the dev tools should open at the bottom of the screen. I hope that this helps.

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Thank you Seburo. I had looked through DEV tools before but had missed on the Network tab, the circle with a cross through it for request blocking. I think this will do what I need. I had hoped there would be an easier way to go online/offline with the new Firefox. This would help with PWA development and testing.

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Great, glad to hear it.

You may want to learn more about our dev tools and Firefox Developer Edition at

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For anyone else that needs to go online/offline quickly, right click the top toolbar (where tabs are) > check 'Menu Bar' > File > Work Offline.

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Thank you for your feedback, I hope that you like using Firefox dev tools.