Mozilla-Tabstack
recommended: observeMozilla-Tabstack is an AI agent operated by Mozilla that performs programmatic, AI-driven interactions with web content through Tabstack.
What it does
Mozilla-Tabstack crawls systematically and at volume, because it feeds an index that many AI customers query. Expect recurring visits that cover large parts of your site rather than single pages. Bursts often trace back to a customer request on its end rather than anything on yours.
How to identify it
User-agent contains any of:
Mozilla-Tabstack
robots.txt
Well-behaved crawlers honor robots.txt. To control Mozilla-Tabstack:
Allow full access
User-agent: Mozilla-Tabstack
Allow: /Block entirely
User-agent: Mozilla-Tabstack
Disallow: /
Grey-area scrapers ignore robots.txt. Botscope enforces your policy at the edge or origin regardless —
see how →
See Mozilla-Tabstack on your own site
Botscope shows every bot and AI agent hitting your site — and lets you allow, challenge, or block each one. Observe first, enforce when you're ready.
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