A terrific free, useful, intuitive and unobtrusive add-on -- a great productivity tool which should be in the "Recommended extensions" category!

I have been happily using this in it's most basic mode ("Native highlighting") for quite a while before reviewing its options today following the update to v2.3 and "discovering" the "Custom highlighting" features of multiple highlights in different/selectable colors, and the scroll bar search/location markers -- yet more elegantly-implemented genius!

However, there is no obvious way to contribute to the author so as to fund the awarding of (at least) the "Verified extensions" designation (read the caution in the title's summary description "This add-on is not actively monitored for security by Mozilla. Make sure you trust it before installing. Learn more"). See "Add-on Badges -- Firefox Help" at https://support.mozilla.org/en-US/kb/add-on-badges

I hope he knows I'm grateful for this "gift".