Rated 3 out of 5 stars
If Cocoon turns out to be capable of smoothly and efficiently doing what it claims, it will not only be the Firefox add-on of the year, but also the best add-on since the inception of Firefox.
I agree with the other reviewer about the nag screens being beyond annoying. Like that user, I ended up dishing out the $20 after about 15 minutes of experimenting just to quieten those incessant prompts stating that the feature isn't available in the free version. It seemed like MOST features aren't available in the free version!
It was difficult enough with this somewhat complex extension to figure out how to configure and use it without all of that going on at the same time. The tutorials are totally for the full blown versions and make no reference to limitations of any free version. In fact, several of the short videos are written for features that aren't even available in the free version. The developers clearly don't want to keep anyone at the free level indefinitely. As such, they should be more ethical and simply offer the free trial only, and not a free version.
I didn't seem to get the 30 day free trial promised because the prompts required my credit card. I'm not sure why that happened, but I let it go because I wanted to get those pop-ups gone and get back to my experimentation while areas of concern were fresh on my mind.
There could be more Firefox extensions incompatible with Cocoon than the handful mentioned in their support documentation, but I could certainly be wrong about that. Something is causing it to glitch out on me with freezes and crashes. Some of these suspected interfering extensions may not even be needed as it seems the intent of Cocoon is to combine the benefits of a number of other extensions, even though the means of doing it may vary. Their means may be superior to the other extensions for all I know. If that's true, there is great potential for this add-on once a more user friendly version is rolled out.
If it works as advertised, depending on whether it is complete solutions or workarounds that are devised for the the buggy behavior, it may eventually warrant 4 and maybe 5 stars.
The most annoying drawback at the moment is that I've apparently paid for a year's subscription and just found that this extension doesn't work with the upgrade to Firefox that just came out (18.0). I find that pretty much unacceptable, though maybe forgivable if they fix it today or tomorrow at the latest.