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Checks the websites you are visiting whether they are affected by the Heartbleed vulnerability.
This add-on has been marked as experimental by its developers
This add-on is not compatible with your version of Firefox because of the following:
About this Add-on
It achieves this by automatically checking the websites you are visiting whether they are affected by the HeartBleed Vulnerability and notifies you in case they are.
The check works by uploading only the domain name to the "http://filippo.io/Heartbleed/"-API and parsing the results.
In case you come across an affected website, you should immediately notify the website owner! Not only the website itself is exposed to danger, but also your private data!
If you're interested in a similiar addon for Google Chrome, you can find one here:
Features - if one can even call it that:
You can learn more about the vulnerability at http://heartbleed.com/:
"The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. [...]
The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software. This compromises the secret keys used to identify the service providers and to encrypt the traffic, the names and passwords of the users and the actual content. This allows attackers to eavesdrop on communications, steal data directly from the services and users and to impersonate services and users."
You can also find more information at: http://breaking.systems/blog/2014/04/foxbleed-check-your-frequently-visited-websites-en-passant
(cc) quickly hacked together with love by Fabian Bräunlein