Luckily, I came across the small Brief Firefox extension which fulfilled all of my wishes. It’s lightweight, it’s a firefox extension, and it has the “unread”-folder as well as a nice and elaborate handling. It’s content-view is skinnable (though I have yet to come across a skin that suited me better than the original one), there are a handful of reasonable options, and it integrates with the Firefox-RSS-capabilities as well using it’s dynamic bookmarks system.
It’s just as the synopsis on the homepage says: “Brief is a light-weight feed reading extension for Firefox. Designed to be easy to use and streamlined, with exactly the right set of features.” – ’nuff said.

So if you happen to be in the market for RSS-Readers, make sure to check this one out.

It delivers what the firefox dictionary can’t. You may lookup words by simply pressing a hotkey, the word will be looked up and explained in great detail in the sage. If the word does not exist in the dictionary it presents a list of words that look similar or use the wildcard button to find the word you are looking for.

The great thing about the sage is not that it is easy to use. It’s purpose is not to deliver fast results, the process to lookup a word is simply to slow to be effective (mark a word, hit the hotkey, look it up in the sage, manually edit the word). The sage is effective when it comes to understanding words that you do not know. It also helps by being able to work with almost any other program on your computer.

As you all know the firefox dictionary is restricted to firefox and thunderbird, what if you want to write something in an instant messenger ?  The Sage has a history function, can stay on top if you like. It displays synonyms and hypernyms while looking up the word and is able to create anagrams from the word as well.

Oh, the hotkey is CTRL+SHIFT+A, took a while to look it up in the documentation.