One of the few tools that supports searching for a single letter/character. Best regex-supported page searcher I've used so far.

The best extension when it come to readability of the search results. The darkening off the background makes this extension so much better than any other.

Wow, impressive, but it's not compatible with Firefox 115.12.0 esr (64-bit), only with Firefox 127.0.1 (64-bit). Note: Firefox for Windows.