Add firefox extension

extensions/firefox/content.js

@@ -0,0 +1,32 @@
+function stripRedirect(URL, redirectRegex) {
+  for (var i = 0; i < redirectRegex.length; i++) {
+    var rule = redirectRegex[i];
+    var result = new RegExp(rule.pattern).exec(URL);
+
+    if (result) {
+      var newURL = result.groups.baseUrl;
+      try {
+        return decodeURIComponent(newURL);
+      } catch (e) {
+        console.log(e);
+        return URL;
+      }
+    }
+  }
+
+  return URL;
+}
+
+function stripRedirects() {
+  var Links = document.querySelectorAll("a.postlink, a.autolinker_link");
+
+  browser.storage.local.get("rfd-redirects", function (redirectRegex) {
+    Links.forEach(function (Link) {
+      var ReferralURL = Link.href;
+
+      Link.href = stripRedirect(ReferralURL, redirectRegex["rfd-redirects"]);
+    });
+  });
+}
+
+stripRedirects();