Mozilla Thunderbird
Find the previous match
In Mozilla Thunderbird, Ctrl + Shift + G will find the previous match. It is listed for Windows, and no Mac version is documented here.
Where it works: Reading a message
Shift and F3 also finds the previous match.
Where this comes from
Keyboard shortcuts - Thunderbird Help
Documentation checked on 2026-09-14. That is a documentation review, not a test run inside the application.