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multiprocess windows turned off

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Multiprocess Windows is off. Says "0/2 (Disabled by add-ons)"

Browers.tabs.remote are both set to true

How do I find out which add-on is the problem? Turn all off and adding back in one a time, restarting, rechecking, is way too complicated. If FF knows an add-on turned off multiprocess, it should know which one, right? Thx. Windows 7, 64-bit, quad processor

Multiprocess Windows is off. Says "0/2 (Disabled by add-ons)" Browers.tabs.remote are both set to true How do I find out which add-on is the problem? Turn all off and adding back in one a time, restarting, rechecking, is way too complicated. If FF knows an add-on turned off multiprocess, it should know which one, right? Thx. Windows 7, 64-bit, quad processor

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Maybe check the extensions.json file in the profile folder to check compatibility info (multiprocessCompatible) for each extension.

You can use the builtin JSON viewer and drag the file in a tab or the Scratchpad (Pretty Print) to inspect the file.


You can use the about:profiles page to find the location of the profile in "AppData\Roaming".

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So how do I launch the viewer?

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The builtin viewer should launch automatically when you drag a file with a .json file extension in a tab provided that devtools.jsonview.enabled is set to true on the about:config page.