Right Click Search eBay от Breakink

Right Click Search for eBay is a lightweight Firefox extension that adds quick eBay search options to the right-click menu. Highlight text on any webpage, right-click, and search active eBay listings or sold/completed listings.

The extension does not collect, store, sell, or share user data. It only opens an eBay search page using the text you selected when you choose one of the search options.