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Help me to run Firefox 48 on MacOS Sequoia

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Mattia
Mattia

Background: I need to run an enterprise web app on selected PCs and Macs, the browser will not be used for browsing, do not highlight security risks.

I must absolutely use Firefox 48 because it is the latest version to support showModalDialog()

I installed Firefox 48 on Windows and everything is ok, it works as it should.

On MacOS Sequoia, on the other hand, Firefox starts, the menus in the “Apple” bar at the top are usable, but the browser window is totally transparent, only the border and title bar are slightly visible.

I read on the support forum that it might be enough to disable hardware acceleration, but I can't do that because the options page doesn't even show!

Background: I need to run an enterprise web app on selected PCs and Macs, the browser will not be used for browsing, do not highlight security risks. I must absolutely use Firefox 48 because it is the latest version to support showModalDialog() I installed Firefox 48 on Windows and everything is ok, it works as it should. On MacOS Sequoia, on the other hand, Firefox starts, the menus in the “Apple” bar at the top are usable, but the browser window is totally transparent, only the border and title bar are slightly visible. I read on the support forum that it might be enough to disable hardware acceleration, but I can't do that because the options page doesn't even show!

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James
James
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The rather old Firefox 48.0 was released way back on August 2, 2016

For Firefox 48.0 the macOS system requirements for Fx 48.0 at the time was macOS 10.9, 10.10, 10.11 https://www.mozilla.org/firefox/48.0/system-requirements/

So it is no surprise if Fx 48.0 does not work well on recent versions of macOS.

Also make sure you are not sharing the same Firefox Profile between Firefox 48.0 and recent Firefox versions and use separate Profiles for each. https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

Τροποποιήθηκε στις από τον/την James

cor-el
cor-el
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You may have to install Rosetta 2.