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Third-party host

Websites loading from opensource.fb.com

31 websites load from this host according to the stored source@if (Model.Total > HostModel.MaxSites) { ; the 200 highest-ranked are listed }. script, iframe and stylesheet are tags in the HTML; connect is an absolute URL inside one of the site's own scripts.

#WebsiteRankLoaded as
1 dating4u.ai 317,438 connect view source
2 docusaurus.io 386,222 connect view source
3 hhvm.com 391,836 connect view source
4 recoiljs.org 402,654 connect view source
5 draftjs.org 402,952 connect view source
6 hacklang.org 446,232 connect view source
7 glean.software 467,083 connect view source
8 yogalayout.dev 1,100,519 connect view source
9 lexical.dev 1,193,234 connect view source
10 pyrefly.org 1,272,091 connect view source
11 pyre-check.org 1,821,363 connect view source
12 fblitho.com 1,837,796 connect view source
13 sapling-scm.com 1,861,161 connect view source
14 stylexjs.com 1,872,321 connect view source
15 buck2.build 1,876,105 connect view source
16 metrobundler.dev 1,946,026 connect view source
17 infima.dev 1,946,379 connect view source
18 dotslash-cli.com 1,946,970 connect view source
19 mephisto.ai 32,545,448 connect view source
20 20-words-intro.vercel.app connect view source
21 astryx-canary.vercel.app connect view source
22 ml-react-dev.vercel.app connect view source
23 ospocc.vercel.app connect view source
24 stylex-docusaurus-nmn.vercel.app connect view source
25 stylex-docusaurus.vercel.app connect view source
26 magicpenta.github.io connect view source
27 docusaurus-2.netlify.app connect view source
28 docusaurus-archive-october-2023.netlify.app connect view source
29 react-native.netlify.app connect view source
30 reactnative-archive-august-2023.netlify.app connect view source
31 reactnative-archive-august-2025.netlify.app connect view source

Questions

Which websites load from opensource.fb.com?
The 31 sites listed on this page. A site is listed when its stored HTML has a script, iframe or stylesheet from the host, or one of its own scripts names the host in an absolute URL.
Is opensource.fb.com a third party for every site listed?
Yes: a host under a site's own registrable domain is never recorded for that site, so every site here loads from opensource.fb.com as a dependency outside its own domain.

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