Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Why can't I install AdBlock Plus? I keep getting the message that the signing cannot be verified, but I'm getting the download from the Mozilla site.

linders01@comcast.net
linders01@comcast.net
more options

I have tried to install AdBlock Plus from the list of Add-ons on Mozilla, but I keep getting a message that the installation was not allowed because signing could not be verified.

I have tried to install AdBlock Plus from the list of Add-ons on Mozilla, but I keep getting a message that the installation was not allowed because signing could not be verified.

All Replies (2)

deimo
deimo
more options

If its asking about the author verification then you can simply allow and install.

If you have a program called "TDC Digital Signatur" installed on your computer, it may interfere with critical parts of Firefox, including add-on compatibility check, add-on update and Firefox update.

You can try installing it from AdblockPlus website: http://adblockplus.org/en/

This support link might help as well: https://support.mozilla.com/en-US/kb/Unable%20to%20install%20add-ons

Good luck.

linders01@comcast.net
linders01@comcast.net Question owner
more options

Thanks. For some reason, I'm doing all these steps and it's still not working. But I appreciate your suggestions.