https://addons.mozilla.org/de/firefox/addon/foxbleed/
(http://breaking.systems/blog/2014/04/foxbleed-check-your-frequently-visited-websites-en-passant)
and
https://chrome.google.com/webstore/detail/chromebleed/eeoekjnjgppnaegdjbcafdggilajhpic
(https://github.com/PwnicornDev/heartbleed-test.crx)
(http://breaking.systems/blog/2014/04/foxbleed-check-your-frequently-visited-websites-en-passant)
and
https://chrome.google.com/webstore/detail/chromebleed/eeoekjnjgppnaegdjbcafdggilajhpic
(https://github.com/PwnicornDev/heartbleed-test.crx)