π¨ Auto Highlight will help you see what's important on the web! β
β‘ Supports RegExp search and many style and highlight options β
π₯· Hide text by setting font size to zero!

Auto Highlight - Text Marker and Searcher Add-On
Auto Highlight is a fully automatic and easy to use text marker, highlighter, eraser, searcher, and style fixer add-on for Firefox. It supports RegExp search, offers many style and highlight options, and allows you to hide text by setting font size to zero. It also supports advanced search options using regular expressions, synchronization to all your devices, and much more.
Add-on stats
Weekly download count: 130
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood:
Manifest version: 2
Permissions:
- contextMenus
- storage
- scripting
- alarms
- activeTab
- <all_urls>
Size: 2.02M
Email: ad*****@fastaddons.com
URLs: Website
Ranking
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Add-on summary
π¨ Auto Highlight is a fully automatic and easy to use text marker / highlighter / eraser / searcher / style fixer. No need to use search anymore to find important information! π
β TOP FEATURES:
- highlight keywords like: 1080p, HDR, 4K, x265, HEVC, 5.1
- hide text - by changing font size to zero or by making it transparent
- advanced search options using regular expressions (regexp), exact match, ignore diacritics and more
- change style - background, text size and color
- automatic synchronization π to all your devices (using native Firefox Sync.)
- highlight "Free shipping", "Out of stock" and other important labels
- doing research about specific topic? Use "Temporal highlight" feature to highlight keywords on every page.
β€ Support independent developer and a Friend of Add-ons:
- I'm full-time add-on developer and your donation is my only income. There are no ads in my add-ons! β Please support my work by: Thank you! :) Your donation will help me keep this add-on working in future versions of Firefox!
π Privacy Policy: https://github.com/fastaddons/AutoHighlight/blob/master/PRIVACY_POLICY.md
See moreUser reviews
Pros
- Very versatile and customizable
- Works great for highlighting keywords
- Supports regular expressions which enhances usability
- Functional across multiple platforms including Firefox Android
- Helps locate highlighted text easily with markers on the scrollbar
Cons
- Occasionally alters parts of the content on web pages
- PDF highlighting is not supported, limiting its use for researchers
- Side screen scroll highlight can block text and clump together
- Some users experienced issues with functionality and settings not working
- QuotaExceededError can occur after prolonged use, rendering it unusable
Most mentioned
- Highlighting features are very useful, especially for keyword identification
- Customizability and support for regular expressions are standout features
- Desire for PDF support and enhanced functionality across platforms
- Issues with the add-on functionality stopping suddenly or settings not applying
User reviews
by Brian Peiris, 2025-01-24
by Myro~n, 2025-01-05
Excellent!!,....Very versatile, stable and simply the "Best" to use ...Keep up the great work!!!
by Firefox user 18702040, 2024-11-25
Add-on safety
Risk impact
Auto Highlight requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood
Auto Highlight has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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