This is caused by Firefox upgrade, some components without oh signature cannot be used. After exploring, there is a method that can be used:
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1. Type about:debugging in the address bar, select this Firefox, and re-enter the add-on temporarily.
Note that method 1 is temporary. If you restart the browser plug-in, it will not work. You need to reload the add-on after restarting the browser every time. -
2. Replace other versions of Firefox browser
