Useful, simple and gives a very good summary/summary on headed pages Rated 4 out of 5 stars

I use it some months now and must say, its great to know all the sites which want to crawl into my browsers cache (and maybe somewhere else)!
The placeholders for i.e. images are great. If you hover over a placeholder, you can read the source of the image and then decide to switch that site on in the preferences very quickly.

I'm only missing a sync feature. Im-/Exporting is possible though, but I'm working with my MAC the whole day and after work its very inconvenient/time-consuming to export and import the black- or whitelist to my PC

Beside this, its a great addon and its greatly helps users to get a clue whats "behind" the page, they're surfing!

necessary. very! Rated 4 out of 5 stars

this is a great plugin. i wished, i had discovered it bevore no-script, because this one is intuitive *and* not that bloated (no-script has a lot more features maybe, but i only "need" those here in the extension, so don't get me wrong, no-script is still a goodie!).
another user wrote, that working with this plugin is much work, which is true, but for me, it is important not to switch of my brain and get important information out of the little red icon in the status-bar of firefox. the log-console is great too!
i only wished, it would sync via firefox-sync, because doing all the clicking/allowing/denieing work could be a hassle, altough the plugin comes with good and common presets for user which don't want to be hassled from the very begining :-)
i like it. thank you mr. developer!

This review is for a previous version of the add-on (0.5.27.1-signed.1-signed).