It was causing Firefox to freeze every 10 seconds for 10 seconds whenever I had a tab open to YouTube or a website with YouTube embedded videos. I disabled each addon individually and determined it was this addon causing the freezing.
Other than that, it is a good idea for an addon and, as a web developer, very useful to know the licenses on content. But the freezing of Firefox needs to be fixed before I will enable it again.
This tool is a great idea, thanks to its developer ! But I personnaly use CC BY (or BY-SA) pictures and other media files to an open source project. But this extension doesn't appear on images webpage in Wikipedia or Flikr !
I love this add-on because it makes it extremely easy to quickly cite a CC-licensed work for referencing in a blog post for example. You can copy "plain text" or HTML right after clicking the icon. The plain text is particularly useful for students like me in citing works from the web in presentations and projects.
I also really like how the icon is hidden into the address bar, and only appears when there is content on the page with metadata for the CC-licensed work.
The add-on is extremely easy to install (no restart!) and use.
This would be a really useful tool if more sites would get behind the CC standards, but as it is, the only times you ever seem to see this add-on in action is when you're on a site like Creative Commons Search, where the additional information is not remotely useful.
Version 0.9.8 has been in the addons.mozilla.org review queue for a month, and is compatible with Firefox 6 and 7. You can find it at https://addons.mozilla.org/en-US/firefox/addon/openattribute/versions/0.9.8 if you want to install manually.
I really appreciate this add-on and the Open Attribution project overall. It's cool to see the CC icon show up in the location bar on pages that have CC licenses in place for its content instead of having to search the page for licensing info, and even cooler to have quick access to a copy and paste attribution link.
Now I can easily see the CC terms of reusing, modifying, and redistributing content from sites like deviantART.com, SoundCloud, Wikipedia, Wikimedia, Flickr, and others.
Thanks for developing this very useful add-on and project.