Detect and handle the case of our own typo correction extension being installed in parallel

lib/typoAppIntegration.js

 /* 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/. */
 
 let {hook} = require("hooks");
 let {application, addonName} = require("info");
 
 let functionHooks = new WeakMap();
 
 exports.removeFromWindow = function(window)
 {
   if (functionHooks.has(window))
   {
     let unhook = functionHooks.get(window);
     unhook();
     functionHooks.delete(window);
   }
+  
+  require("typoBootstrap").cleanup();
 };
 
 switch (addonName)
 {
   case "url-fixer":
   {
     // URL Fixer
     exports.isTypoCorrectionEnabled = function(window, prefix, domain, suffix) true;
     
     break;
@@ skipping 328 matching lines @@
     };
 
     break;
   }
   default:
   {
     exports.isKnownWindow = function(window) false;
     break;
   }
 }