Add icon sizes to setIcon to match manifest browserAction

Author: adam-p

README.md

@@ -19,7 +19,9 @@ This results in a cleaner migration for existing Firefox users.
 
 2. Modify old version to detect if it's running on Firefox, prompt the user to install the new extension and uninstall the old extension.
    ```
-   AddonManager.getInstallForURL('https://addons.mozilla.org/firefox/downloads/latest/markdown-here/addon-375281-latest.xpi', function(install) {console.log(arguments); install.install()}, 'application/x-xpinstall')
+   AddonManager.getInstallForURL('https://addons.mozilla.org/firefox/downloads/latest/markdown-here/addon-375281-latest.xpi', function(install) {console.log(arguments); install.install()}, 'application/x-xpinstall');
+
+   AddonManager.getAddonByID('[email protected]', function(install) {console.log(arguments); install.uninstall()});
    ```
 
 3. Coordinate with AMO reviewers to allow the install/uninstall action. (Via IRC?)

src/chrome/backgroundscript.js

@@ -95,8 +95,11 @@ chrome.runtime.onMessage.addListener(function(request, sender, responseCallback)
         tabId: sender.tab.id });
       chrome.browserAction.setIcon({
         path: {
+          "16": Utils.getLocalURL('/common/images/icon16-button-monochrome.png'),
           "19": Utils.getLocalURL('/common/images/icon19-button-monochrome.png'),
-          "38": Utils.getLocalURL('/common/images/icon38-button-monochrome.png')
+          "32": Utils.getLocalURL('/common/images/icon32-button-monochrome.png'),
+          "38": Utils.getLocalURL('/common/images/icon38-button-monochrome.png'),
+          "64": Utils.getLocalURL('/common/images/icon64-button-monochrome.png')
         },
         tabId: sender.tab.id });
       return false;
@@ -108,8 +111,11 @@ chrome.runtime.onMessage.addListener(function(request, sender, responseCallback)
         tabId: sender.tab.id });
       chrome.browserAction.setIcon({
         path: {
+          "16": Utils.getLocalURL('/common/images/icon16-button-disabled.png'),
           "19": Utils.getLocalURL('/common/images/icon19-button-disabled.png'),
-          "38": Utils.getLocalURL('/common/images/icon38-button-disabled.png')
+          "32": Utils.getLocalURL('/common/images/icon32-button-disabled.png'),
+          "38": Utils.getLocalURL('/common/images/icon38-button-disabled.png'),
+          "64": Utils.getLocalURL('/common/images/icon64-button-disabled.png')
         },
         tabId: sender.tab.id });
       return false;