Like many users of Firefox, I have customized my browser with a number of those handy little Add-Ons which can make your browsing more convenient and enjoyable.
We all enjoy those add-ons which are created and maintained by friendly developers of he Mozilla community - right ?
Well - not necessarily, as I have just learned.
Over at gHacks.com, Martin Brinkmann has posted an article about the dark side of Mozilla's add-on suppository and exposes how certain companies are buying add-ons directly from the developers and configuring them to send information about the user's browsing activities.
In my case, one of a my favorite add-ons - a handy utility called "Auto Copy" - was recently purchased by a company called Wips.com and, as a result, that add-on now keeps a record of every website I visit - and I found their name on a number of entries in the "about:config" menu - which I disabled.
Apparently Mozilla has no terms or conditions regrading the transfer of ownership of an add-on, does not participate in those transfers, and does not provide any notices or warnings when they occur.
I suggest you have a look at the article on gHacks - it's very informative.
"How companies take advantage of Mozilla’s Addon repository"
By Martin Brinkmann