diff --git a/ext/src/lib/getBridgeInfo.js b/ext/src/lib/getBridgeInfo.ts
similarity index 81%
rename from ext/src/lib/getBridgeInfo.js
rename to ext/src/lib/getBridgeInfo.ts
index 6ef2cef..449d98c 100644
--- a/ext/src/lib/getBridgeInfo.js
+++ b/ext/src/lib/getBridgeInfo.ts
@@ -1,7 +1,19 @@
+"use strict";
+
 import semver from "semver";
 
-export default async function getBridgeInfo () {
-    let applicationVersion;
+export interface BridgeInfo {
+    name: string;
+    version: string;
+    expectedVersion: string;
+    isVersionExact: boolean;
+    isVersionCompatible: boolean;
+    isVersionOlder: boolean;
+    isVersionNewer: boolean;
+}
+
+export default async function getBridgeInfo (): Promise<BridgeInfo> {
+    let applicationVersion: string;
     try {
         applicationVersion = await browser.runtime.sendNativeMessage(
                 APPLICATION_NAME
diff --git a/ext/src/lib/messageRouter.js b/ext/src/lib/messageRouter.ts
similarity index 52%
rename from ext/src/lib/messageRouter.js
rename to ext/src/lib/messageRouter.ts
index 69de90d..b5a1780 100644
--- a/ext/src/lib/messageRouter.js
+++ b/ext/src/lib/messageRouter.ts
@@ -1,17 +1,18 @@
 "use strict";
 
-const routeMap = new Map();
+type SenderCallback = (message: any, details: any) => void;
 
+const routeMap = new Map<string, SenderCallback>();
 
-function register (routeName, senderCallback) {
+function register (routeName: string, senderCallback: SenderCallback) {
     routeMap.set(routeName, senderCallback);
 }
 
-function deregister (routeName) {
+function deregister (routeName: string) {
     routeMap.delete(routeName);
 }
 
-function handleMessage (message, details) {
+function handleMessage (message: any, details?: any) {
     const destination = message.subject.split(":")[0];
     if (routeMap.has(destination)) {
         routeMap.get(destination)(message, details);
@@ -22,4 +23,4 @@ export default {
     register
   , deregister
   , handleMessage
-}
+};
diff --git a/ext/src/lib/utils.js b/ext/src/lib/utils.js
deleted file mode 100644
index 0ef08a5..0000000
--- a/ext/src/lib/utils.js
+++ /dev/null
@@ -1,21 +0,0 @@
-"use strict";
-
-export function getNextEllipsis (ellipsis) {
-    return {
-        "": "."
-      , ".": ".."
-      , "..": "..."
-      , "...": ""
-    }[ellipsis];
-}
-
-export function getWindowCenteredProps (refWin, width, height) {
-    const centerX = refWin.left + (refWin.width / 2);
-    const centerY = refWin.top + (refWin.height / 3);
-
-    return {
-        width, height
-      , left: Math.floor(centerX - width / 2)
-      , top: Math.floor(centerY - height / 2)
-    };
-}
diff --git a/ext/src/lib/utils.ts b/ext/src/lib/utils.ts
new file mode 100644
index 0000000..962238f
--- /dev/null
+++ b/ext/src/lib/utils.ts
@@ -0,0 +1,33 @@
+"use strict";
+
+export function getNextEllipsis (ellipsis: string): string {
+    /* tslint:disable:curly */
+    if (ellipsis === "") return ".";
+    if (ellipsis === ".") return "..";
+    if (ellipsis === "..") return "...";
+    if (ellipsis === "...") return "";
+    /* tslint:enable:curly */
+}
+
+
+interface WindowCenteredProps {
+    width: number;
+    height: number;
+    left: number;
+    top: number;
+}
+
+export function getWindowCenteredProps (
+        refWin: browser.windows.Window
+      , width: number
+      , height: number): WindowCenteredProps {
+
+    const centerX = refWin.left + (refWin.width / 2);
+    const centerY = refWin.top + (refWin.height / 3);
+
+    return {
+        width, height
+      , left: Math.floor(centerX - width / 2)
+      , top: Math.floor(centerY - height / 2)
+    };
+}
diff --git a/ext/src/options/Bridge.tsx b/ext/src/options/Bridge.tsx
index 2b6867f..f071efc 100644
--- a/ext/src/options/Bridge.tsx
+++ b/ext/src/options/Bridge.tsx
@@ -7,6 +7,8 @@ import semver from "semver";
 import { getNextEllipsis
        , getWindowCenteredProps } from "../lib/utils";
 
+import { BridgeInfo } from "../lib/getBridgeInfo";
+
 const _ = browser.i18n.getMessage;
 
 const ENDPOINT_URL = "https://api.github.com/repos/hensm/fx_cast/releases/14720978";
@@ -53,7 +55,7 @@ const BridgeDownloads = (props: BridgeDownloadsProps) => (
 
 
 interface BridgeStatsProps {
-    info: any;
+    info: BridgeInfo;
 }
 
 const BridgeStats = (props: BridgeStatsProps) => (
@@ -99,7 +101,7 @@ const BridgeStats = (props: BridgeStatsProps) => (
 
 
 interface BridgeProps {
-    info: any;
+    info: BridgeInfo;
     platform: string;
     loading: boolean;
 }
diff --git a/tslintCommon.json b/tslintCommon.json
index 013976d..0e18b50 100644
--- a/tslintCommon.json
+++ b/tslintCommon.json
@@ -11,7 +11,7 @@
       , "max-classes-per-file": false
       , "max-line-length": [ true, {
             "limit": 80
-          , "ignore-pattern": "//|.*\";$"
+          , "ignore-pattern": "//|.*(\"|`);?$"
         }]
       , "member-access": [ true, "no-public" ]
       , "no-console": [ true, "log" ]