How To Install Unsigned Add-Ons In Firefox 43

Firefox 43 came out just a few days ago and with it a new security feature that Firefox had already introduced to its beta channels made its way to the stable release. As of version 43, unsigned add-ons can no longer be installed. The move is meant to prevent unsuspecting users of accidentally installing malicious add-ons from somewhere outside the Firefox market place. Mozilla’s intentions are no doubt noble but most users aren’t happy with the change. Install Unsigned Add-ons is a Firefox add-on that will let you install unsigned add-ons. It doesn’t block Firefox’s initial attempt to warn you against potentially installing an untrustworthy add-on, however, once you explicitly click the ‘allow’ button, you are able to install the add-on.

When you install an unsigned add-on in Firefox 43, you see the following pop-up. Clicking ‘Allow’ isn’t helpful since it still doesn’t let you install the add-on. Perhaps there are exceptions when it does work but for the most part, it does nothing.

Once you install Install Unsigned Add-ons, you will see the initial warning sign. After you click the ‘Allow’ button, a second warning with an install option will pop up. Click it and the add-on will be installed.

install unsigned add-on

Install Unsigned Add-ons also lets you check for and enable add-ons that Firefox 43 might have disabled when you upgraded the browser. Unfortunately, the add-on pops up a box asking if you want to check for disabled add-ons every single time you open Firefox which is beyond annoying.

install unsigned add-ons

It’s probably best to enable the add-on only when you need to install an unsigned one. That way you can still take advantage of the security check that Firefox has added.

Install Install Unsigned Add-ons For Firefox

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About Lily Herman

Lily Herman
Lily Herman is a New York-based writer and editor. In recent months, her work has been featured in Teen Vogue, Glamour, Refinery29, Cosmopolitan, TIME, Newsweek, Fast Company, and Mashable. You can check out her website, LinkedIn, and Twitter.

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