diff --git a/ext/browser-polyfill.min.js b/ext/browser-polyfill.min.js
new file mode 100644
index 0000000..efa7b16
--- /dev/null
+++ b/ext/browser-polyfill.min.js
@@ -0,0 +1,9 @@
+(function(a,b){if("function"==typeof define&&define.amd)define("webextension-polyfill",["module"],b);else if("undefined"!=typeof exports)b(module);else{var c={exports:{}};b(c),a.browser=c.exports}})(this,function(a){"use strict";if("undefined"==typeof browser){a.exports=(()=>{const 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new Error("api-metadata.json has not been included in browser-polyfill");class d extends WeakMap{constructor(o,p=void 0){super(p),this.createItem=o}get(o){return this.has(o)||this.set(o,this.createItem(o)),super.get(o)}}const e=o=>{return o&&"object"==typeof o&&"function"==typeof o.then},f=(o,p)=>{return(...q)=>{chrome.runtime.lastError?o.reject(chrome.runtime.lastError):p.singleCallbackArg||1===q.length?o.resolve(q[0]):o.resolve(q)}},g=(o,p)=>{const q=r=>1==r?"argument":"arguments";return function(s,...t){if(t.length<p.minArgs)throw new Error(`Expected at least ${p.minArgs} ${q(p.minArgs)} for ${o}(), got ${t.length}`);if(t.length>p.maxArgs)throw new Error(`Expected at most ${p.maxArgs} ${q(p.maxArgs)} for ${o}(), got ${t.length}`);return new Promise((u,v)=>{s[o](...t,f({resolve:u,reject:v},p))})}},h=(o,p,q)=>{return new Proxy(p,{apply(r,s,t){return q.call(s,o,...t)}})};let i=Function.call.bind(Object.prototype.hasOwnProperty);const j=(o,p={},q={})=>{let r=Object.create(null),s={has(t,u){return u in t||u in r},get(t,u){if(u in r)return r[u];if(u in t){let w=t[u];if("function"==typeof w){if("function"==typeof p[u])w=h(t,t[u],p[u]);else if(i(q,u)){let x=g(u,q[u]);w=h(t,t[u],x)}else w=w.bind(t);}else if("object"==typeof w&&null!==w&&(i(p,u)||i(q,u)))w=j(w,p[u],q[u]);else return Object.defineProperty(r,u,{configurable:!0,enumerable:!0,get(){return t[u]},set(x){t[u]=x}}),w;return r[u]=w,w}},set(t,u,v){return u in r?r[u]=v:t[u]=v,!0},defineProperty(t,u,v){return Reflect.defineProperty(r,u,v)},deleteProperty(t,u){return Reflect.deleteProperty(r,u)}};return new Proxy(o,s)},l=new d(o=>{return"function"==typeof o?function(q,r,s){let t=o(q,r);return e(t)?(t.then(s,u=>{console.error(u),s(u)}),!0):void(void 0!==t&&s(t))}:o}),m={runtime:{onMessage:(o=>({addListener(p,q,...r){p.addListener(o.get(q),...r)},hasListener(p,q){return p.hasListener(o.get(q))},removeListener(p,q){p.removeListener(o.get(q))}}))(l)}},n=Object.assign({},chrome);return j(n,m,c)})()}else a.exports=browser});
+//# sourceMappingURL=browser-polyfill.min.js.map
+
+
+// webextension-polyfill v.0.2.1 (https://github.com/mozilla/webextension-polyfill)
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
\ No newline at end of file
diff --git a/ext/icons/icon.svg b/ext/icons/icon.svg
deleted file mode 100644
index b2b2a36..0000000
--- a/ext/icons/icon.svg
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/ext/manifest.json b/ext/manifest.json
index 62483c7..7302288 100644
--- a/ext/manifest.json
+++ b/ext/manifest.json
@@ -4,22 +4,25 @@
     "version": "0.1.0",
     "description": "Shows conversations on Hacker News about the current web page",
     "icons": {
-        "48": "icons/icon.svg",
-        "96": "icons/icon.svg"
+        "16": "icons/icon16.png",
+        "48": "icons/icon48.png",
+        "96": "icons/icon96.png",
+        "128": "icons/icon128.png"
     },
     "content_scripts": [
         {
             "matches": ["<all_urls>"],
             "js": [
+                "browser-polyfill.min.js",
                 "content.js"
             ]
         }
     ],
     "background": {
-        "scripts": ["background.js"]
+        "scripts": ["browser-polyfill.min.js", "background.js"]
     },
     "browser_action": {
-        "default_icon": "icons/icon.svg",
+        "default_icon": "icons/icon48.png",
         "default_title": "Looped In"
     },
     "content_security_policy": "script-src 'self'; object-src 'self'; connect-src 'self' http://hn.algolia.com"