Perfect for the job it does! Rated 5 out of 5 stars

Wonderfully simple, no fuss add-on that does the job with no problems at all.
No fancy settings to sort out and not options to figure out just plain and simple highlighting chosen words.
Thankyou, the_dingo, for developing this :)

A little addon that makes a poweruser smile Rated 3 out of 5 stars

A simple, non-configurable addon, yet good enough for everybody to use. Raises usability considerably.

Lacks a "matches found count", which would be appreciated highly.

Some little bugs still are inside in ver. 0.3 (TypeError: e is undefined on line 42 in neon_highlighter.js)

It breakes addons that works with selection of text (eg. Google Translator for Firefox), waiting for a fix.

Note: if you ever used Neon Highlighter (wersions <0.3) You probably want to check it again, as it got faster in version 0.3 (I mean, now it is normal, not SLOW).