When I attempt to Install the extension into Firefox 56.0.1 a popup appears saying "This add-on could not be installed because it appears to be corrupt".
What can I do to download the extension...
Type: Posts; User: Reg
When I attempt to Install the extension into Firefox 56.0.1 a popup appears saying "This add-on could not be installed because it appears to be corrupt".
What can I do to download the extension...