X-FB-Debug

HTTP response header

X-FB-Debug header contains a unique value that is used by Facebook to track issues and connect a submitted issue with a specific response.

Header usage statistics

X-FB-Debug response header information and usage statistics.
Websites using header X-FB-Debug4,078
Percentage of websites that use X-FB-Debug header<0.1%
Total discovered header values4,078
Header uses directivesNo
Header values are unique or randomYes
Most popular in the country United States

X-FB-Debug Directives

X-FB-Debug directives value information and usage statistics
DirectiveShareWebsites countUnique Values

X-FB-Debug header usage distribution by website popularity



Geographical Distribution

Header usage distribution by websites across the globe.



Websites utilizing X-FB-Debug

List of websites that use X-FB-Debug header
DomainCountryRankContacts
facebook.com United States2
www.facebook.com United States2
instagram.com United States9
www.instagram.com United States9
messenger.com United States12
www.messenger.com United States12
See full domain list

Common header values

List of top common X-FB-Debug header values
Header valueValue prevalence
//7CsIY0y9Yu7HMwVUJKLjAG20e6Tv8ASCzulNF03wLzalUfijOOn2NboJRL0D2QLhedOhzJUSasbV2I18HsxQ==0.02%
//tg3za1B/6u97FWEoC6tURVERaEFykq9naLFt2IdmznOYRQ6Un7NFkCoST9vGcCNbuhAMhAc4mFJeDOUbGKSQ==0.02%
//Z9kA3xgAPU648YtoF2ULfdTBYyxobmKswomdwNzvK39Vec5B5OIL7vnHQCuYCNP23YVNFLLa0XdXH2v0Kixg==0.02%
/+t4AdoPdr1thydE+3PQ0AXG4chbhO856REkDl5r+ny2dz/m8SuEzcSr4iOxA//pmQLi6q7mf3B0hB7QLKzQVg==0.02%
/0Ib0cDORz3i2/bt6EMv8PDNaQX5qh+RSbRR5Oybwl7FCsj4i9oz22jWdoZUqsz8p7D0dC8hxH4BZlzBKKUGfg==0.02%
/0OJQcxAKTDbWdmXc4jGShYEsOfUOgHBEBkFaDQf6qw9YF+Qp/Z/4mRZorEirp5jdypswG7MsTc51OjfRy51zg==0.02%
/0qx+flrnOxhBMouFlyvsCDGzY0K41JF4eqxJWmX62QgX8vS9oi+rTlXMWotwEpTj698eT6GrYdxdFZV/3nCPA==0.02%
/35ViOuNRtYgcMVBeYvI4RyhdGhueLRkWlQLXHJhUtyNYMTelP6zm4+UKaSF0OjHDyPZQU+P7r4WzVCu5ydmhQ==0.02%
/3Cvw6brHQJk35ZadsuOhW9AYfO+40r/uZCKw6kY0MDpgfzUZQFQ+zmL4fqDMX1sf2+NfnLXRP6xGTraVpFowA==0.02%
/4Dydy1LS99fA8ZdFQKblFizNpWOCnvPvZHYA6JQVvlxRQ7OVZ/h5gikO70gY8TOEeP4ffzTFoNwfe+kpI91rw==0.02%
/4G6RNL9sEwBDN8Ea1WAr6JHw5xySABmG82ie9Br2xngdCtQkS49XB4flQr56vRSm8aavIHEmIQUzXukHwoduQ==0.02%
/5Ubl/jWS/vFlXk74HidbFT8IRz0hLWs+Yy1dChY8K6kwmdLgemUHU8MTxjFRkih1NwhcogHa3iD7dAlwYq6kw==0.02%
/5uo90qoqNNb0y1KoBflDNs7NZaC2OHVs/K1zrJkktqcS1x9gCxUAc2aTsyvBmfhMjvklQndY6l/jVBrWnRSdw==0.02%
/5yKNdUmwvJK6935/oZQj9MhwfmaLgIdLc1e/Lzxw+CcDDnQ9HM6hRfWWNVf2pAxi7LXwJLdkcweYwe/JJSCxw==0.02%
/6fJxTd9HRmCfflx1CYFn+Vs7WcuA4ys9CyK+aVaec2qDxMr3gZC4TlSHI6VQ/e+5ZqURC8yIGZboCbitXsrgA==0.02%
/78D/c0RsfBN1IvgXyPltkO+my2+c/rPrKBhm6EEzmkVeMfRVBjdVQ9DUe5+qGLHdb7erwVxhQRrQAwbDiiOFQ==0.02%
/868s0/s+KJ+5wFu5/Geu5LqnaHEVRatxb5y0U+HKwBkyfs01bJpUaxOVgMj4/ARG9PhmowBzmRlB45wbKmpOw==0.02%
/8dUHaXLZ19owIRfhN3IpROTgxokP0OeqTNE+jhjKWVV3SocvjCjS5xeYB+kINMw9x6vgNTqbuFOWXxuurSuhg==0.02%
/9qu71NqneEMOH7818hzG2wAO3sEq77bavhD9GFAL83UNZ07L9kRDkYYdL8okHsCp6ag+14dWVuUIHeXP1cD/A==0.02%
/A+xvNzTxJVBXvghMIj1TcK0/RftGpGF/fNF3GaPc3o09e1+UTi30ebM61NLrbYyr2wZW1T+lC25x+vdSy1Ipw==0.02%