The below is a number of toolbar buttons that will open various pages. If you would like to create your own you can use the Custom Link Button Maker. The links in all these extensions can be changed in their options window after beings installed.
Opens Codefisher.org to check outs its browser extensions, graphic work, and programs and tools.
Open the Mozilla's site for Firefox Extensions.
Opens YouTube, a extremely popular video sharing site.
Opens the worlds most popular search engine, Google.
Opens Amazon.com, the worlds most popular e-commerce site.
Opens Wikipedia, a free encyclopedia built collaboratively using wiki software.
Open Yahoo! Mail
Open PayPay online payment system.
Open eBay online shopping