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Rated 5 out of 5 stars
I’ve relied on this extension for a long time. It works fine in the Firefox 4 betas, but the new link URL-on-hover feature isn’t supported. Thankfully, the Link Target Display extension  lets me keep Locationbar² around. https://addons.mozilla.org/en-US/firefox/addon/55724/This review is for a previous version of the add-on (1.0.5).