Certificate expiration
Shows how many days the website certificate has left until is expires.
Certificate Expiration - Firefox Add-on
Certificate expiration is a Firefox add-on that checks the number of days left until the certificate for the current page expires. It displays the day count on top of a padlock icon in the toolbar and turns red if there are less than 29 days left. It also shows an unlocked red padlock if the site connection is not encrypted.
Add-on stats
Manifest V2
Weekly download count: 3
Firefox on Android: No
Permissions:
- webRequest
- webRequestBlocking
- <all_urls>
- tabs
Size: 53.75K
URLs: Website
Full description: See detailed description
Source: Firefox Browser Add-ons
User reviews
Great for being alert to SSL certificates that are about to expire.
Note that the colour-changing padlock is a new button (it doesn't change the browser's existing padlock), and that in 2023-era Firefox you have to add this yourself. Firefox doesn't show it among the ‘Customise Toolbar’ buttons; instead, you now need to go to the ‘jigsaw’ button which lists extensions, then click on the gear for ‘Certificate expiration’ and choose ‘Pin to Toolbar’. You can then use ‘Customise Toolbar’ to drag it to where you want it.
And also note that Mozilla blocks extensions on this Add-Ons site, so this isn't a good page for trying it out and seeing how it works!
by Smylers, 2023-02-06
Add-on safety
Risk impact
Certificate expiration requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
- Low ******* ****** ** *** ********* ********
Risk likelihood
Certificate expiration has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details
Similar add-ons
Here are some Firefox add-ons that are similar to Certificate expiration:
leroy
- 0.00 
(0)
(0)
J88
8 5.00 (1)
(1)Ross
- 0.00 (0)
(0)Brewing Hot
6 0.00 (0)
(0)
Angus Dippenaar
22 0.00 (0)
(0)Saowin
2 0.00 (0)
(0)Winbet58k.com
- 0.00 (0)
(0)Elena Cotton
- 0.00 (0)
(0)F8bet
19 0.00 (0)
(0)