Here’s my vote for the best Firefox extension of all time: IE Tab, which lets you run Internet Explorer right in its own Firefox tab.
It’s the biggest time-saver I’ve come across in a long time. After you install it, when you’re viewing a page in a Firefox tab, right-click the page, select “View Page in IE Tab” and it loads the page into IE, right in that tab.
Up until now, I’ve had to run both Firefox and IE at the same time, because some Web sites still only work properly in IE. But now, I just run those sites right inside Firefox.
It’s run every page I’ve tried, without a single problem. So if you’re tired of having to run IE and Firefox at the same time, check this one out.
What’s your favorite Firefox extension?