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I use Firefox for browsing the web. Firefox has so many cool tools - known as "extensions" - for translating words, phrases and whole web pages on the fly with one click.
Free Language has published articles on two of these thus far...
Quick Translation Firefox Extension to Translate Single Words in 17+ Languages
FoxLingo Free Firefox Browser Extension Software for Translating Web Pages
...and there are loads more!
With this quick blog post, I just wanted to point out a pre-defined search for "translation" on the Firefox extension download site. Have a look, try out a few and find one or two that work best for your particular target language(s) and needs. These web browser extensions can be a huge time-save, making your language work online more productive.