Some Google tools come in quite handy for foreign language learners. I use Google Chrome, even so the following tips should work equally well with Firefox.
Google translate
Install Google translate browser plug-in and you can get instant translation of any webpage with a mouse click. You can configure which languages you want to use. Google translate is anything but perfect but when it comes to machine translation there is probably no better tool (not even among paid ones).
Google dictionary plug-in
Much more useful than google translate is Google dictionary for language learners. If you install the plug-in all you need to do is double click an unknown word and you get a call-out telling you the meaning of the word and its pronunciation (audio).
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