ZetaMarker Web Highlighter by ZetaMarker Ltd.

Highlight and annotate web pages in Firefox for Android on phones, tablets, and other Android devices. Save highlights, comments, and page notes locally on your device, then optionally sync them to your ZetaMarker account so your research is available across supported devices.

WHAT ZETAMARKER DOES

• Highlight text on web pages using five highlight colors
• Add comments to individual highlights and notes to entire pages
• Search your local library across page titles, URLs, highlights, comments, and page notes — directly on your device
• Copy highlights and manage local storage
• Use ZetaMarker without an account for local highlighting and annotation
• Optionally sync your highlights and notes with your ZetaMarker account

HOW IT WORKS

1. Open a web page in Firefox for Android.
2. Choose "Enable on this site" when prompted.
3. Select text, choose a highlight color, and optionally add a comment.
4. Return to the page later and your highlights will be restored automatically.
5. Open Settings from the add-on menu to sign in, browse your Local pages, or manage your account.

You choose which websites ZetaMarker can run on. Once you enable a site, ZetaMarker can restore your highlights there without asking you to enable it again on every visit. You can decline a site or turn highlighting off later.

📱 LOCAL FIRST, CLOUD SYNC WHEN YOU WANT IT

ZetaMarker is designed to work locally by default.

When you're signed out:

• Your highlights, comments, page notes, and site choices remain in the browser's local storage on your device.
• Nothing is sent to ZetaMarker's servers for cloud synchronization.

When you sign in:

• ZetaMarker securely connects to your ZetaMarker account.
• Cloud synchronization may transmit page URLs, highlighted text, comments, and page notes so they can appear in your web dashboard and on other signed-in devices.
• Your account is also used to manage your library and determine your trial or subscription status.
• We do not sell your data.

🔎 LOCAL PAGES VS. WEB DASHBOARD

Local pages lets you browse and search what you've saved on this Android device without signing in. Its search covers page titles, URLs, highlighted text, comments, and page notes.

The web dashboard provides access to your cloud library and additional features such as search, hierarchical labels, and export for eligible plans. You can also upload local PDF files to the web dashboard and annotate them directly there.

These are separate libraries and search experiences:

• Local pages searches data stored on this device.
• The web dashboard searches your cloud-synchronized library.

⭐ FREE & PRO

Free

Highlight and annotate web pages locally on your Android device. No account required.

Pro

Cloud synchronization and access to the full web dashboard, including features such as search, hierarchical labels, and export. The web dashboard also lets you upload local PDF files and annotate them directly in your dashboard.

Start with a 7-day free trial — no credit card required.

Cloud synchronization requires sign-in and an eligible trial or Pro plan.

Plans

🔒 PRIVACY & PERMISSIONS

ZetaMarker asks for website access so it can highlight and restore content on the sites you choose to enable. It does not automatically activate highlighting on every website you visit.

You control which sites ZetaMarker runs on. You can decline a site or turn highlighting off later.

Local data is stored on your device when you're signed out. When you sign in and enable cloud synchronization, the information needed to provide that service is transmitted to ZetaMarker's servers.

Learn more:

Privacy & Control

Privacy Policy

Terms of Service

💻 ALSO AVAILABLE ON DESKTOP

ZetaMarker is also available for Firefox on desktop and for Chrome and other Chromium-based browsers.

With the same ZetaMarker account and an eligible trial or Pro plan, you can sync your library across your Android device, desktop browsers, and the ZetaMarker web dashboard.

Learn more and find installation links

Note: PDF highlighting and the built-in PDF viewer are available in the desktop extensions and are not part of this Android add-on.

🚀 GET STARTED

• Android guide
• Documentation
• Web dashboard
• Support: support@zetamarker.com

Installing the add-on or creating a ZetaMarker account means you agree to ZetaMarker's Terms of Service.