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Windows 10 pc. After factory reset and reinstall of Firefox, 2 extensions are enabled but the menu bar won't allow them.

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Windows 10 64bit pc. After factory reset and reinstall of Firefox, 2 extensions are enabled but the menu bar won't allow them. These worked OK before the reset.

Troubleshooting within Firefox won't work because it disables the extensions.

The messages from Extensions say "Can't read and change data on this site" The extensions are enabled (turned on).

The 2 extensions are Malwarebytes Browser Guard and Video DownloadHelper I am using DuckDuckGo as my browser. I tried switching to Google, but same problem.

Windows 10 64bit pc. After factory reset and reinstall of Firefox, 2 extensions are enabled but the menu bar won't allow them. These worked OK before the reset. Troubleshooting within Firefox won't work because it disables the extensions. The messages from Extensions say "Can't read and change data on this site" The extensions are enabled (turned on). The 2 extensions are Malwarebytes Browser Guard and Video DownloadHelper I am using DuckDuckGo as my browser. I tried switching to Google, but same problem.

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Panda said

The messages from Extensions say "Can't read and change data on this site"

Extensions are prevented from working on some Mozilla sites like this one for security reasons.