Thank you for the time invested into debugging this. At least we know now that something in the profile is causing this. If you are able to invest a bit more time into this, it would be great if you could debug your said profile configuration on another new profile, one by one settings, identifying which of your main profile configuration is causing this. P.S. You don't need to put it on portable. In order to create and use a new profile, just install a 2nd Firefox in a different location or use the -p argument to start with [profile manager](https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles).
Bug 1700918 Comment 5 Edit History
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Thank you for the time invested into debugging this. At least we know now that something in the profile is causing this. If you are able to invest a bit more time into this, it would be great if you could debug your said profile configuration on another new profile, one by one settings, identifying which of your main profile configuration is causing this. P.S. You don't need to put it on portable. In order to create and use a new profile, just install a 2nd Firefox in a different drive location or use the -p argument to start with [profile manager](https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles).