Certificate expiration by Johan

Shows how many days the website certificate has left until is expires.

4.5 (4 reviews)

147 Users

You’ll need Firefox to use this extension

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About this extension

This is a simple Firefox extension that checks the number of days left until the certificate for the current page expires and displays it to the user.

It then shows the day count on top of a padlock icon in the toolbar. If there are less than 29 days left of the certificate the icon turns red. If the site connection is not encrypted it shows an unlocked red padlock instead.

Rated 4.5 by 4 reviewers

Release notes for 3.0

I switched the cache to be based on origin, not hostname, to distinguish between http and https requests.

I also added a new Clear cache button to the addon popup.

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