Further corrections to manifest

src/platform/firefox/manifest.json

 {
-	"manifest_version":	2,
-	"name":				"AlwaysKillSticky",
-	"version":			"1.0.1",
-	"description":		"Get rid of sticky elements on websites - permanently!",
-	"author":			"Said Achmiz",
-	"homepage_url":		"https://git.sr.ht/~achmizs/AlwaysKillSticky.git",
-	"permissions":		[ "activeTab", "storage" ],
-	"background":		{
-		"scripts":			["background.js"]
+	"manifest_version":				2,
+	"name":							"AlwaysKillSticky",
+	"version":						"1.0.1",
+	"description":					"Get rid of sticky elements on websites - permanently!",
+	"author":						"Said Achmiz",
+	"browser_specific_settings":	{
+		"gecko":						{
+			"id":							"AlwaysKillSticky@saidachmiz.net",
+			"strict_min_version":			"57.0"
+		}
+	},
+	"homepage_url":					"https://git.sr.ht/~achmizs/AlwaysKillSticky.git",
+	"permissions":					[ "activeTab", "storage" ],
+	"background":					{
+		"scripts":						["background.js"]
 	},
-	"content_scripts":	[	{
-			"matches":			[ "http://*/*", "https://*/*" ],
-			"run_at":			"document_end",
-			"js":				[ "functions.js", "contentScript.js" ]
+	"content_scripts":				[	{
+			"matches":						[ "http://*/*", "https://*/*" ],
+			"run_at":						"document_end",
+			"js":							[ "functions.js", "contentScript.js" ]
 		}
 	],
-	"page_action":		{
-		"default_popup":	"popup.html",
-		"default_title":	"AlwaysKillSticky - Click the icon to control sticky-killing on this site!",
-		"default_icon":		{
-			"16":				"images/ASK_on_16.png",
-			"32":				"images/ASK_on_32.png",
-			"48":				"images/ASK_on_48.png",
-			"128":				"images/ASK_on_128.png"
+	"page_action":					{
+		"default_popup":				"popup.html",
+		"default_title":				"AlwaysKillSticky - Click the icon to control sticky-killing on this site!",
+		"default_icon":					{
+			"16":							"images/ASK_on_16.png",
+			"32":							"images/ASK_on_32.png",
+			"48":							"images/ASK_on_48.png",
+			"128":							"images/ASK_on_128.png"
 		}
 	},
-	"icons":			{
-		"16": "images/ASK_on_16.png",
-		"32": "images/ASK_on_32.png",
-		"48": "images/ASK_on_48.png",
-		"128": "images/ASK_on_128.png"
+	"icons":						{
+		"16": 							"images/ASK_on_16.png",
+		"32": 							"images/ASK_on_32.png",
+		"48": 							"images/ASK_on_48.png",
+		"128": 							"images/ASK_on_128.png"
 	},
-	"options_ui":		"options.html"
+	"options_ui":					{
+		"page":							"options.html",
+	    "open_in_tab": 					true
+	}
 }