MSTS-Dictionary provides an online English Dictionary for Firefox.
This extension's main target users are people who are studying English, such as immigrants, ELS students and university students. Those whose English level is moderate mostly use English-English dictionary which is like this extension offers.
This extension helps them not to look up a word in a traditional paperback dictionary during the web surfing, but it provides the easier way with them to look up a word in the browser, instead. Users don't need to leave their computer.
Also this extension is fetching a definition dynamically, which means this extension retrieves a definition of a word through the internet, so any definition is always accurate, correct and up-to-date. They never be old-fashioned!
HOW TO INSTALL
1. Save the msts_dict-x.x.x-fx.xpi anywhere you want.
2. Drag and drop msts_dict-x.x.x-fx.xpi on Firefox.
3. The install wizard will appear, them follow the instruction.
5. Restart FireFox, them you can use the wonderful web-based dictionary, 'MSTS-Dictionary'!
HOW TO USE
1,Select any word that you want know its definition.
2,Then, right click.
3,Select Look up "word".
4,The panel which shows the definition comes up!