No matter which browser you use you should use the Translation Bookmarklets and the Reference Bookmarklets. They don't work perfectly but are better than nothing at all. They will never replace human translators or reference librarians.

a bookmarklet is an applet, a small computer application, stored as the URL of a bookmark in a web browser or as a hyperlink on a web page. Whether bookmarklet utilities are stored as bookmarks or hyperlinks, they are designed to add one-click functionality to a browser or web page.
a bookmarklet performs some function, one of a wide variety such as a search query or data extraction. Usually the applet is a JavaScript program.