Highlight This: finds and marks words от Wim Deboel

- No registration required
- Organize your search words in groups and lists
- All data stored locally
- Auto-refreshes highlights on page reload and content changes
- Unlimited words and lists
- Free

Easy to use Add-on that automatically searches for defined words in the current browser tab and marks them in a text. Many more advanced features available through settings:
- Create color-coded keyword lists
- Disable highlighting on certain sites
- Export or import your settings and keyword lists
- Use lists from Pastebin

** New in 5.2
- Fixed downloading external word lists
- Added the ability to use Google Sheets to manage word lists
- Define action when clicking on a highlight

** New in 5.1
- Support for Regex tokens
- Support for case sensitive matching
- A new word editor

** Now on Firefox (4.4.1)
The extension has 30000 users on the Chrome store and is now also available on Firefox

** Define words **
Easily specify words and phrases you want to be highlighted.

** Highlighting **
Highlights the words and phrases on the page
Shows how many words have been highlighted

** Works on Ajax pages **
The extension detects changes to the page and re-highlights the words.