[v1.7.3] Firefox compability patch (#32)

- Added Firefox support (#28)
- Updated settings defaults
- Updated `about:` protocol behavior
- Fixed collections header becoming the old one on a tab removing
- Added VS Code debugging config
- Removed trailing whitespaces

manifest.json

@@ -1,12 +1,12 @@
 {
 	"name": "__MSG_name__",
-	"version": "1.7",
+	"version": "1.7.3",
 	"manifest_version": 2,
 	"description": "__MSG_description__",
 	"author": "__MSG_author__",
 	"default_locale": "en",
 
-	"permissions": 
+	"permissions":
 	[
 		"tabs",
 		"unlimitedStorage",
@@ -14,15 +14,41 @@
 		"<all_urls>",
 		"contextMenus"
 	],
-	
-	"icons": 
+
+	"icons":
 	{
 		"128": "icons/light/empty/128.png",
 		"48": "icons/light/empty/48.png",
 		"32": "icons/light/empty/32.png",
 		"16": "icons/light/empty/16.png"
 	},
-	"browser_action": { "default_icon": "icons/light/empty/32.png" },
+	"browser_action":
+	{
+		"default_icon": "icons/light/empty/32.png",
+		"theme_icons":
+		[
+			{
+				"size": 128,
+				"dark": "icons/light/full/128.png",
+				"light": "icons/dark/full/128.png"
+			},
+			{
+				"size": 48,
+				"dark": "icons/light/full/48.png",
+				"light": "icons/dark/full/48.png"
+			},
+			{
+				"size": 32,
+				"dark": "icons/light/full/32.png",
+				"light": "icons/dark/full/32.png"
+			},
+			{
+				"size": 16,
+				"dark": "icons/light/full/16.png",
+				"light": "icons/dark/full/16.png"
+			}
+		]
+	},
 	"web_accessible_resources": [ "*" ],
 
 	"background":
@@ -51,5 +77,13 @@
 				"mac": "Command+Shift+P"
 			}
 		}
+	},
+	"browser_specific_settings":
+	{
+		"gecko":
+		{
+			"id": "tabsaside@xfox111.net",
+			"strict_min_version": "58.0"
+		}
 	}
 }