Could you please help find a plug-in for Firefox that supports the following functions:
- Showing translation of a word by a simple shortcut (like Shift + Right click).
- Allowing to modify list of dictionaries (by giving links to web dictionaries).
- Storing the words into personal vocabulary for later reference.
- Allowing to type in the word for translation.
There is a large list of plug-ins for Firefox that have some of the functionality above, but after quite a long time I wasn't able to find one that satisfies all of the requirements.
However, if you know some good plug-ins that do not satisfy the requirements, but are good in some other sense, this is also very welcome!