diff --git a/ext/bg/background.html b/ext/bg/background.html
index c35e917d..c6a84636 100644
--- a/ext/bg/background.html
+++ b/ext/bg/background.html
@@ -1,6 +1,7 @@
+
diff --git a/ext/bg/js/polyfill-gecko.js b/ext/bg/js/polyfill-gecko.js
new file mode 100644
index 00000000..8c7cc403
--- /dev/null
+++ b/ext/bg/js/polyfill-gecko.js
@@ -0,0 +1,15 @@
+// Gecko does not currently support chrome.storage.sync, use storage.local instead
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1220494
+if (!chrome.storage.sync) {
+ chrome.storage.sync = chrome.storage.local;
+}
+
+// Gecko does not currently support chrome.runtime.onInstalled, just ignore calls to it
+// (https://bugzilla.mozilla.org/show_bug.cgi?id=1252871)
+if (!chrome.runtime.onInstalled) {
+ chrome.runtime.onInstalled = {
+ 'addListener' : function(){},
+ 'hasListener' : function(){},
+ 'removeListener' : function(){}
+ };
+}
\ No newline at end of file
diff --git a/ext/bg/options.html b/ext/bg/options.html
index 289a0f60..a2b4a56b 100644
--- a/ext/bg/options.html
+++ b/ext/bg/options.html
@@ -163,6 +163,7 @@
+