O
Observatory
Mozilla Observatory security scanner
About this crawler
Observatory is a web crawler identified by the regular-expression pattern Observatory in the User-Agent request header. It is categorised as scanner. Use the regex above to detect, log, allow, or block Observatory traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- Observatory
- Pattern
Observatory- Tags
- scanner
- Added
- 2026/05/09
- Instances
- 1 known sample(s)
Sample User-Agent strings
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0 Observatory/82.0
Block this crawler
robots.txt — disallow Observatory:
User-agent: Observatory
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Observatory [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "Observatory") {
return 403;
}
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