One of my favorite things about Firefox is the free add-ons constantly being developed for it. When I saw this post on 100 money-saving Firefox add-ons I was blown away by the variety available.
There are add-ons that let you compare prices. There’s a Retail Me Not add-ons which will let you know of any coupon codes if you’re browsing a store. There’s a still-experimental add-on which helps you search for mis-spelled listings on eBay. There are dozens of travel-related add-ons for comparing air-fare, monitoring rates, etc. There are charitably-oriented add-ons and ones that let you check your AdSense or watch your bank accounts.
Not all of these add-ons may work (each add-on’s page has starred review as well as compatibility info), but there are so many good ones that it’s worth checking out for any money-saving/money-managing Firefox user.
(I know it’s link-bait, but it’s useful linkbait!)