From e7e322831136cf11c38d8769bf82925a24cf9198 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 13 Feb 2026 21:41:58 +0000
Subject: [PATCH] Add Facebook Mobile browser detection

Co-authored-by: naorpeled <6171622+naorpeled@users.noreply.github.com>
---
 src/constants.js                     |  2 +
 src/parser-browsers.js               | 15 ++++++
 test/acceptance/useragentstrings.yml | 75 ++++++++++++++++++++++------
 3 files changed, 78 insertions(+), 14 deletions(-)

diff --git a/src/constants.js b/src/constants.js
index 2d06c97..f959562 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -19,6 +19,7 @@ export const BROWSER_ALIASES_MAP = {
   Electron: 'electron',
   Epiphany: 'epiphany',
   FacebookExternalHit: 'facebookexternalhit',
+  'Facebook Mobile': 'facebook',
   Firefox: 'firefox',
   Focus: 'focus',
   Generic: 'generic',
@@ -90,6 +91,7 @@ export const BROWSER_MAP = {
   edge: 'Microsoft Edge',
   electron: 'Electron',
   epiphany: 'Epiphany',
+  facebook: 'Facebook Mobile',
   facebookexternalhit: 'FacebookExternalHit',
   firefox: 'Firefox',
   focus: 'Focus',
diff --git a/src/parser-browsers.js b/src/parser-browsers.js
index a6dd494..b22b65a 100644
--- a/src/parser-browsers.js
+++ b/src/parser-browsers.js
@@ -378,6 +378,21 @@ const browsersList = [
     },
   },
 
+  /* Facebook Mobile */
+  {
+    test: [/\[FBAN\//i],
+    describe(ua) {
+      const browser = {
+        name: 'Facebook Mobile',
+      };
+      const version = Utils.getFirstMatch(/FBAV\/([\d.]+)/i, ua);
+      if (version) {
+        browser.version = version;
+      }
+      return browser;
+    },
+  },
+
   /* SlackBot */
   {
     test: [/slackbot/i, /slack-imgProxy/i],
diff --git a/test/acceptance/useragentstrings.yml b/test/acceptance/useragentstrings.yml
index 6f76be4..346be77 100644
--- a/test/acceptance/useragentstrings.yml
+++ b/test/acceptance/useragentstrings.yml
@@ -1284,20 +1284,6 @@
         engine:
           name: "WebKit"
           version: "601.1.46"
-    - ua: "Mozilla/5.0 (iPhone; CPU iPhone OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15G77 [FBAN/FBIOS;FBDV/iPhone7,2;FBMD/iPhone;FBSN/iOS;FBSV/11.4.1;FBSS/2;FBCR/vfnl;FBID/phone;FBLC/nl_NL;FBOP/5;FBRV/0]"
-      spec:
-        browser:
-          name: "Safari"
-        os:
-          name: "iOS"
-          version: "11.4.1"
-        platform:
-          type: "mobile"
-          vendor: "Apple"
-          model: "iPhone"
-        engine:
-          name: "WebKit"
-          version: "605.1.15"
     -
       ua: "Mozilla/5.0 (SmartHub; SMART-TV; U; Linux/SmartTV) AppleWebKit/531.2+ (KHTML, like Gecko) WebBrowser/1.0 SmartTV Safari/531.2+"
       spec:
@@ -3048,6 +3034,67 @@
           type: "bot"
           vendor: "Meta"
         engine: {}
+  Facebook Mobile:
+    -
+      ua: "Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [FBAN/FBIOS;FBDV/iPhone10,3;FBMD/iPhone;FBSN/iOS;FBSV/14.6;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBAV/328.0.0.29.120]"
+      spec:
+        browser:
+          name: "Facebook Mobile"
+          version: "328.0.0.29.120"
+        os:
+          name: "iOS"
+          version: "14.6"
+        platform:
+          type: "mobile"
+          vendor: "Apple"
+          model: "iPhone"
+        engine:
+          name: "WebKit"
+          version: "605.1.15"
+    -
+      ua: "Mozilla/5.0 (Linux; Android 11; SM-G991B) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.131 Mobile Safari/537.36 [FBAN/FB4A;FBAV/328.0.0.29.120;]"
+      spec:
+        browser:
+          name: "Facebook Mobile"
+          version: "328.0.0.29.120"
+        os:
+          name: "Android"
+          version: "11"
+        platform:
+          type: "mobile"
+        engine:
+          name: "Blink"
+    -
+      ua: "Mozilla/5.0 (iPad; CPU OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [FBAN/FBIOS;FBDV/iPad7,11;FBMD/iPad;FBSN/iOS;FBSV/14.6;FBSS/2;FBID/tablet;FBLC/en_US;FBOP/5;FBAV/328.0.0.29.120]"
+      spec:
+        browser:
+          name: "Facebook Mobile"
+          version: "328.0.0.29.120"
+        os:
+          name: "iOS"
+          version: "14.6"
+        platform:
+          type: "tablet"
+          vendor: "Apple"
+          model: "iPad"
+        engine:
+          name: "WebKit"
+          version: "605.1.15"
+    -
+      ua: "Mozilla/5.0 (iPhone; CPU iPhone OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15G77 [FBAN/FBIOS;FBDV/iPhone7,2;FBMD/iPhone;FBSN/iOS;FBSV/11.4.1;FBSS/2;FBCR/vfnl;FBID/phone;FBLC/nl_NL;FBOP/5;FBRV/0]"
+      spec:
+        browser:
+          name: "Facebook Mobile"
+        os:
+          name: "iOS"
+          version: "11.4.1"
+        platform:
+          type: "mobile"
+          vendor: "Apple"
+          model: "iPhone"
+        engine:
+          name: "WebKit"
+          version: "605.1.15"
   SlackBot:
      -
        ua: "Slackbot-LinkExpanding 1.0 (+https://api.slack.com/robots)"