Add extraHeaders into extraInfos for Chrome

Chrome needs the extraHeaders flag in extraInfos to read the Referer
header.

src/background/index.ts

@@ -21,9 +21,23 @@ declare global {
     }
 }
 
+declare let browser: any;
+
 window.ACTIVE_TAB_ID = chrome.tabs.TAB_ID_NONE;
 window.TABS = new Map<number, Tab>();
 
+function getBrowser() {
+    if (typeof chrome !== 'undefined') {
+        if (typeof browser !== 'undefined') {
+            return 'Firefox';
+        } else {
+            return 'Chrome';
+        }
+    } else {
+        return 'Edge';
+    }
+}
+
 /* Listeners for navigator */
 
 chrome.tabs.onActivated.addListener(handleActivated);
@@ -57,10 +71,14 @@ chrome.webRequest.onBeforeRequest.addListener(handleBeforeRequest, { urls: ['<al
     'blocking',
 ]);
 
+const extraInfos = ['requestHeaders', 'blocking'];
+if (getBrowser() === 'Chrome') {
+    extraInfos.push('extraHeaders');
+}
 chrome.webRequest.onBeforeSendHeaders.addListener(
     handleBeforeSendHeaders,
     { urls: ['<all_urls>'] },
-    ['requestHeaders', 'blocking'],
+    extraInfos,
 );
 
 chrome.webRequest.onHeadersReceived.addListener(handleHeadersReceived, { urls: ['<all_urls>'] }, [