Open Search enables Thunderbird users to search various websites from within Thunderbird and display the results in a Thunderbird tab. This article describes how to add additional websites to the Open Search interface.
The example below shows how to add Google to the website list. (Note that there is a Google Search for Thunderbird add-on that you can install rather than doing the steps described below. These steps are still potentially relevant however for installing other search engines.)
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.3