you can use # tag to add comments in cookies.txt file for your own references if you wish. I don't see any good reason add support for multiple files import, when everything can be loaded into one file.
This simple addon - in one stroke - fixes the whole cookie issue. Cookies are so abused by websites, and with this addon, I've been able to store a "definitive" list of cookies, ones that I know are all I need to preserve, and effectively keep refreshing them on startup.
Not only that, but this addon can read them from a NAS, so I can specify \\paths.
This is quite simply fantastic. Big thanks for fixing the whole nasty cookie issue in one neat addon.
I've just spent half an hour or so on finding out how I can use DuckDuckGo's new search page as my FF start page ... I wanted to be able to use their nice new graphics/layout options but also clean my cookies regularly and yet, not have to sign in to DDG's cloud to restore my settings for each session.
I have the same problem as Aehzebaer on April 2012, and I appear to have tried the same various options. Where do I go from here ? I would have reported this as a bug, except could not find how, hence review. JohnB
In v0.3 I've added some options and there should be more detailed information in browser console if something goes wrong.However this addon uses Firefox's built-in import feature, and in my tests if cookies.txt file is in wrong format or cookies already expired, basically if anything wrong with the file, it doesn't return any errors, it accepts and ignores it.
P.S. support email is listed on right side of the addon's details on mozilla.org page.
EDIT: 2012-04-16 Thank you for your answer! There are no messages in the error console for your AddOn. I have tried it with a "cookies.txt" in the profile path (directory with prefs.js file) and with an own path. The cookies.txt I have had generated with your "Cookie Manager+". If I import this file with the AddOn "Cookie Importer" it works very well.