fixed facebook

src/constants.js

@@ -16,6 +16,7 @@ export const BROWSER_ALIASES_MAP = {
   DuckDuckBot: 'duckduckbot',
   Electron: 'electron',
   Epiphany: 'epiphany',
+  FacebookExternalHit: 'facebookexternalhit',
   Firefox: 'firefox',
   Focus: 'focus',
   Generic: 'generic',
@@ -26,7 +27,6 @@ export const BROWSER_ALIASES_MAP = {
   InternetArchiveCrawler: 'internetarchivecrawler',
   'K-Meleon': 'k_meleon',
   Maxthon: 'maxthon',
-  MetaWebCrawler: 'metawebcrawler',
   'Meta-WebIndexer': 'meta_webindexer',
   'Microsoft Edge': 'edge',
   'MZ Browser': 'mz',
@@ -88,7 +88,7 @@ export const BROWSER_MAP = {
   internetarchivecrawler: 'InternetArchiveCrawler',
   k_meleon: 'K-Meleon',
   maxthon: 'Maxthon',
-  metawebcrawler: 'MetaWebCrawler',
+  facebookexternalhit: 'FacebookExternalHit',
   meta_webindexer: 'Meta-WebIndexer',
   mz: 'MZ Browser',
   naver: 'NAVER Whale Browser',

src/parser-browsers.js

@@ -283,12 +283,12 @@ const browsersList = [
     },
   },
 
-  /* MetaWebCrawler */
+  /* FacebookExternalHit */
   {
     test: [/facebookexternalhit/i, /facebookcatalog/i],
     describe() {
       return {
-        name: 'MetaWebCrawler',
+        name: 'FacebookExternalHit',
       };
     },
   },