Revert "Bug fix"

This reverts commit 6c15d1a.

README.md

@@ -34,7 +34,6 @@ Hit back and try another one!
    * Add "list all versions" for The Internet Archive.
    * Add MementoWeb TimeTravel source.
    * Updated icons (HD)
-   * Bug fixes.
  * Version 5
    * Merged with WebExtensions version from Arrantius (#3 #10)
      * Does not include netError page ([not currently possible](http://bugzil.la/1376793))

manifest.json

@@ -10,7 +10,7 @@
   "applications": {
     "gecko": {
       "id": "[email protected]",
-      "strict_min_version": "57"
+      "strict_min_version": "57.0"
     }
   },
 
@@ -24,8 +24,7 @@
   "browser_action": {
     "default_icon": "icons/page-32.png",
     "default_title": "__MSG_extensionName__",
-    "default_popup": "popup.htm",
-    "browser_style":true
+    "default_popup": "popup.htm"
   },
 
   "commands": {