Firefox add-on with keyword - highlighter

Highlighter allows you to save notable quotes, or "highlights", while reading in your favorite web browser. No matter what or where you read, your highlights are always available to reference whenever you need them.

Highlights all links on Wikipedia

Highlight H1, H2, H3 tags and links

Add Highlights and Notes to a Web Page

The Readwise Highlighter is the official browser extension made by and maintained by the Readwise team that saves articles to your Reader account and enables you to optionally highlight the open web.

Highlight text on websites by toggling the highlighter extension or keyboard shortcut. Saves highlights on your device for future references.

Highlight and comment web pages. Your highlights are stored in your browser bookmarks, automatically recreated when you revisit a web page.

Highlights given keywords on any web page you visit.

🟨 Auto Highlight will help you see what's important on the web! ✅ ⚡ Supports RegExp search and many style and highlight options ⭕ 🥷 Hide text by setting font size to zero!

Highlight text on page to copy to Roam

Search and highlight keywords in any page via toolbar popup.

Create a list of words and phrases you are interested in. See them highlighted on every page you visit.

Highlight lists

Highlights links to any URLs that are bookmarked

Google Calendar

Highlight a row (and column) of current cell in Google Sheets and Microsoft Excel Online.

Highlight occurrences of selected text, with or without a keypress.

Automatically highlight and count all occurrences of a word by selecting it. Custom mode option provides multiple highlighting feature with customizable colors and can also display search markers beside the scrollbar.

Find and highlight elements on the page with this DevTools panel, using CSS styles and selectors.

Automatically finds and highlights words and phrases on the web page according to your list

One platform to organize all your highlights - import Kindle highlights and annotate the web with the built-in highlighter.

Highlights Gmail rows on mouse over. It's a simple css injection. Link to source is on the sidebar.

Highlight multiple words separated by comma, space or arbitrary separator with regular expression support

Highlight text on any website on desktop and mobile with the Mark my Word browser extension for Firefox. Export the highlights to your favorite note-taking tool and keep what is important to you.

A watered-down port to WebExtensions of Prostetnic Highlighter ( https://addons.mozilla.org/en-US/firefox/addon/prostetnic/ )