Key takeaways
- For most people: one metrics toolbar (Ahrefs, SEOquake or MozBar) plus one on-page checker is enough.
- Ahrefs SEO Toolbar, SEOquake, MozBar and Keywords Everywhere all have Firefox versions.
- Keep your extension list short; each one adds memory use and permissions.
What an SEO Toolbar Does
An SEO toolbar is a browser extension that shows search data while you browse: page titles and meta descriptions, headings, links, authority metrics and sometimes search volume. It saves you from opening a separate tool for quick checks on your own pages or a competitor's.
The Best SEO Toolbar Extensions
Ahrefs SEO Toolbar
Available for Chrome and Firefox. The free features include an on-page SEO report, redirect tracing, a broken link checker and HTTP headers. Link and traffic metrics require an Ahrefs subscription. Best for people already using Ahrefs.
SEOquake
Made by Semrush and available for Chrome and Firefox. It adds a SERP overlay with metrics for each search result, plus page audits, keyword density and link analysis. The core features are free. Its Firefox version hasn't been updated in a long time but still works, according to recent reviews.
MozBar
Shows Moz's Domain Authority and Page Authority on pages and search results, plus on-page elements. It's available for Chrome, and Moz rebuilt its Firefox version in 2026. A free Moz account is required.
Keywords Everywhere
Shows search volume and related keywords alongside Google results and other sites. It installs for free on Chrome and Firefox, but search volume and cost-per-click data use paid credits.
Detailed SEO Extension
A free, fast on-page inspector for Chrome: titles, descriptions, canonicals, headings, schema and robots settings in one panel.
Redirect Path
A free Chrome extension that shows every redirect and status code on the way to a page. Essential for technical checks and migrations.
The Best SEO Toolbar for Firefox
| Extension | Firefox | Chrome | Free to use |
|---|---|---|---|
| Ahrefs SEO Toolbar | Yes | Yes | Core features; metrics need a subscription |
| SEOquake | Yes | Yes | Yes |
| MozBar | Yes (rebuilt in 2026) | Yes | With a free Moz account |
| Keywords Everywhere | Yes | Yes | Install free; data uses paid credits |
| Detailed SEO Extension | Check the add-ons store | Yes | Yes |
| Redirect Path | Check the add-ons store | Yes | Yes |
If you're looking for an SEO toolbar Firefox users can rely on, start with the first two rows. Extension availability changes, so confirm on Mozilla's official add-ons store before relying on a tool. For a Firefox SEO toolbar, Ahrefs and SEOquake are the safest starting points.
A Simple Setup That Covers Most Needs
- One metrics toolbar: Ahrefs, SEOquake or MozBar, depending on which platform you trust.
- One on-page checker: Detailed SEO Extension or your toolbar's page report.
- One technical helper: Redirect Path for redirects and status codes.
Only install extensions from official stores, review the permissions they request, and disable the ones you rarely use. For deeper checks than a toolbar can give, try my free SEO audit tool.