Auto Highlight

Auto Highlight

🟨 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!

What is Auto Highlight?
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.
Users: 1,537 ▲ 19
Rating: 4.37 (46)
Version: 5.3 (Last updated: 2023-11-03)
Creation date: 2020-07-21
Weekly download count: 116
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
  • contextMenus
  • storage
  • scripting
  • alarms
  • activeTab
  • <all_urls>
Size: 2.02M
URLs: Website
Stats date:

Other platforms

Auto Highlight
Auto Highlight (v5.3)
4.81 (48) 10,000
Not available on Edge
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🟨 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! 🎉


  • 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 🔄 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.

❤ 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! ☕ Please support my work by: Thank you! :) Your donation will help me keep this add-on working in future versions of Firefox!

🔒 Privacy Policy:

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User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Supports regular expressions
  • Works on Firefox Android as well
  • Useful for scientific research
  • Doesn't work on PDFs
  • Stops working without error message
  • No confirmation for deleting rules
Most mentioned
  • Regular expression support
  • Works on Firefox Android
  • Useful for scientific research
  • Doesn't work on PDFs
  • No confirmation for deleting rules
Recent reviews
Ingenious and amazing solution for highlighting keywords (customer names on the WC orders page) and adding a comment about them. I was hoping to be able to synchronise data with another PC without needing to sync Firefox. Perhaps the possibility of defining the path of the local backup? Thanks!

I would really love this add-on if highlighting would also work in PDFs. I want to use it mainly for scientific research to faster identify relevant papers. The automatic and very fine tunable keyword highlighting combined with the view on the right hand side showing where the highlights are is EXACTLY what I am looking for. Maybe I missed the relevant setting but changing to highlight in every page did not fix it. Adding the PDF functionality would make it a really powerful tool for a (maybe almost every) researcher. Please, please add this! P.S. I tried to find another way of contacting you but this is the only way I could find.
by Maddy, 2024-03-18

by Interstellar_Being, 2024-03-12
View all user reviews
Risk impact

Auto Highlight may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.

Risk likelihood

Auto Highlight is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Upgrade to see risk analysis details