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2026-08-01 crawl · observed, not inferred

Technology used by fb.com

Engineering at Meta Blog

29
technologies detected

Recent changes

2026-08-01 dropped Priority Hintsprovisional
2026-08-01 dropped Isotopeprovisional
2026-01-01 dropped Isotopeconfirmed

Full detected stack

Everything detected on this domain in the latest monthly crawl, grouped by what it does. ↩ marks when we first observed it — no later than that date, not necessarily when they adopted it. Faded dates were seen in fewer than four crawls.

Miscellaneous
RSS↩ Dec 2022Open Graph↩ Sept 2022Prism↩ Jan 2019Popper↩ Apr 2022DocuSign↩ Apr 2024DocuSign↩ Apr 2024
JavaScript libraries
Underscore.js↩ May 2019jQuery Migrate3.4.1↩ Jul 2018jQuery3.7.1↩ Jul 2018FancyBox2.1.5↩ Jul 2018jQuery3.3.1↩ Jul 2018
CDN
Google Hosted Libraries↩ Feb 2022Amazon S3↩ Feb 2020Amazon CloudFront↩ May 2023
SEO
Yoast SEO Premium19.3↩ Feb 2022Yoast SEO27.3|27.3↩ Jan 2019
PaaS
WordPress VIP↩ Mar 2020Amazon Web Services↩ Feb 2019
CMS
WordPress7.0.3|7.0.3↩ Jul 2018
Databases
MySQL↩ Jul 2018
Programming languages
PHP↩ Jul 2018
Authentication
Facebook Login↩ Jun 2021
WordPress themes
Understrap↩ Jun 2026
UI frameworks
Bootstrap4.0.0↩ Jul 2018
Web servers
Nginx↩ Jul 2018
Font scripts
Twitter Emoji (Twemoji)↩ Jul 2018
Security
HSTS↩ Sept 2022
A/B Testing
Google Optimize↩ Feb 2021
Video players
YouTube↩ Jul 2018
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