add firefox extension template

externs/webextension_polyfill/contextualidentities/ContextualIdentity.hx

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+package webextension_polyfill.contextualidentities;
+
+/**
+	Represents information about a contextual identity.
+**/
+typedef ContextualIdentity = {
+	/**
+		The name of the contextual identity.
+	**/
+	var name : String;
+	/**
+		The icon name of the contextual identity.
+	**/
+	var icon : String;
+	/**
+		The icon url of the contextual identity.
+	**/
+	var iconUrl : String;
+	/**
+		The color name of the contextual identity.
+	**/
+	var color : String;
+	/**
+		The color hash of the contextual identity.
+	**/
+	var colorCode : String;
+	/**
+		The cookie store ID of the contextual identity.
+	**/
+	var cookieStoreId : String;
+};

externs/webextension_polyfill/contextualidentities/CreateDetailsType.hx

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+package webextension_polyfill.contextualidentities;
+
+/**
+	Details about the contextual identity being created.
+**/
+typedef CreateDetailsType = {
+	/**
+		The name of the contextual identity.
+	**/
+	var name : String;
+	/**
+		The color of the contextual identity.
+	**/
+	var color : String;
+	/**
+		The icon of the contextual identity.
+	**/
+	var icon : String;
+};

externs/webextension_polyfill/contextualidentities/OnCreatedChangeInfoType.hx

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+package webextension_polyfill.contextualidentities;
+
+typedef OnCreatedChangeInfoType = {
+	/**
+		Contextual identity that has been created
+	**/
+	var contextualIdentity : ContextualIdentity;
+};

externs/webextension_polyfill/contextualidentities/OnRemovedChangeInfoType.hx

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+package webextension_polyfill.contextualidentities;
+
+typedef OnRemovedChangeInfoType = {
+	/**
+		Contextual identity that has been removed
+	**/
+	var contextualIdentity : ContextualIdentity;
+};

externs/webextension_polyfill/contextualidentities/OnUpdatedChangeInfoType.hx

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+package webextension_polyfill.contextualidentities;
+
+typedef OnUpdatedChangeInfoType = {
+	/**
+		Contextual identity that has been updated
+	**/
+	var contextualIdentity : ContextualIdentity;
+};

externs/webextension_polyfill/contextualidentities/QueryDetailsType.hx

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+package webextension_polyfill.contextualidentities;
+
+/**
+	Information to filter the contextual identities being retrieved.
+**/
+typedef QueryDetailsType = {
+	/**
+		Filters the contextual identity by name.
+		Optional.
+	**/
+	@:optional
+	var name : String;
+};

externs/webextension_polyfill/contextualidentities/Static.hx

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+package webextension_polyfill.contextualidentities;
+
+typedef Static = {
+	/**
+		Retrieves information about a single contextual identity.
+	**/
+	function get(cookieStoreId:String):js.lib.Promise<ContextualIdentity>;
+	/**
+		Retrieves all contextual identities
+	**/
+	function query(details:QueryDetailsType):js.lib.Promise<Array<ContextualIdentity>>;
+	/**
+		Creates a contextual identity with the given data.
+	**/
+	function create(details:CreateDetailsType):js.lib.Promise<ContextualIdentity>;
+	/**
+		Updates a contextual identity with the given data.
+	**/
+	function update(cookieStoreId:String, details:UpdateDetailsType):js.lib.Promise<ContextualIdentity>;
+	/**
+		Deletes a contetual identity by its cookie Store ID.
+	**/
+	function remove(cookieStoreId:String):js.lib.Promise<ContextualIdentity>;
+	/**
+		Fired when a container is updated.
+	**/
+	var onUpdated : webextension_polyfill.events.Event<(changeInfo:OnUpdatedChangeInfoType) -> Void>;
+	/**
+		Fired when a new container is created.
+	**/
+	var onCreated : webextension_polyfill.events.Event<(changeInfo:OnCreatedChangeInfoType) -> Void>;
+	/**
+		Fired when a container is removed.
+	**/
+	var onRemoved : webextension_polyfill.events.Event<(changeInfo:OnRemovedChangeInfoType) -> Void>;
+};

externs/webextension_polyfill/contextualidentities/UpdateDetailsType.hx

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+package webextension_polyfill.contextualidentities;
+
+/**
+	Details about the contextual identity being created.
+**/
+typedef UpdateDetailsType = {
+	/**
+		The name of the contextual identity.
+		Optional.
+	**/
+	@:optional
+	var name : String;
+	/**
+		The color of the contextual identity.
+		Optional.
+	**/
+	@:optional
+	var color : String;
+	/**
+		The icon of the contextual identity.
+		Optional.
+	**/
+	@:optional
+	var icon : String;
+};