Inject automatically on install etc., add mime types, and fix nits.

go-back-with-backspace/manifest.json

Index: go-back-with-backspace/manifest.json
diff --git a/go-back-with-backspace/manifest.json b/go-back-with-backspace/manifest.json
index 9d314c8242a48d5d7f3db07bb522308d7cdb53d3..4d29f066c09c436443c0ec5ecc2dafdfb14a6797 100644
--- a/go-back-with-backspace/manifest.json
+++ b/go-back-with-backspace/manifest.json
@@ -2,7 +2,7 @@
   "name": "__MSG_extensionName__",
   "description": "__MSG_extensionDescription__",
   "default_locale": "en",
-  "version": "1.6",
+  "version": "2.0",
   "manifest_version": 2,
   "minimum_chrome_version": "52",
   "icons": {
@@ -35,7 +35,10 @@
     "chrome_style": true
   },
   "permissions": [
+    "activeTab",

[Devlin, 2016/09/27 16:08:57]

if you need all_urls, there's not really a reason to also use activeTab.

[Pam (message me for reviews), 2016/09/27 23:37:32]

Done.

+    "management",
     "storage",
-    "activeTab"
+    "tabs",

[Devlin, 2016/09/27 16:08:57]

Do you actually need this?

[Pam (message me for reviews), 2016/09/27 23:37:32]

Apparently not. Thanks.

+    "<all_urls>"
   ]
 }