diff --git a/main/Base.lproj/Main.storyboard b/main/Base.lproj/Main.storyboard
index 7b1ea0c..81b3fcb 100644
--- a/main/Base.lproj/Main.storyboard
+++ b/main/Base.lproj/Main.storyboard
@@ -178,7 +178,7 @@
                                             <autoresizingMask key="autoresizingMask"/>
                                             <subviews>
                                                 <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="kmY-ot-lJW">
-                                                    <rect key="frame" x="256" y="6" width="45" height="31"/>
+                                                    <rect key="frame" x="256" y="6" width="44" height="31"/>
                                                     <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxY="YES"/>
                                                     <connections>
                                                         <action selector="toggleVPNProxy:" destination="qdB-ZO-LHY" eventType="valueChanged" id="y95-2Z-Uep"/>
@@ -202,7 +202,7 @@
                                             <autoresizingMask key="autoresizingMask"/>
                                             <subviews>
                                                 <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="9Ko-sD-7x0">
-                                                    <rect key="frame" x="95" y="7" width="124" height="30"/>
+                                                    <rect key="frame" x="94" y="7" width="125" height="30"/>
                                                     <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                                     <state key="normal" title="Export DB"/>
                                                     <connections>
@@ -339,7 +339,13 @@
                             <outlet property="delegate" destination="q3B-Yi-1bx" id="02X-f0-d1a"/>
                         </connections>
                     </tableView>
-                    <navigationItem key="navigationItem" title="Domains" id="FWA-IG-VIb"/>
+                    <navigationItem key="navigationItem" title="Domains" id="FWA-IG-VIb">
+                        <barButtonItem key="rightBarButtonItem" systemItem="add" id="RFW-bp-wwH">
+                            <connections>
+                                <action selector="addNewFilter" destination="q3B-Yi-1bx" id="JID-eH-y0p"/>
+                            </connections>
+                        </barButtonItem>
+                    </navigationItem>
                 </tableViewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="Xzo-dO-WpK" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
             </objects>
diff --git a/main/Extensions/AlertSheet.swift b/main/Extensions/AlertSheet.swift
index 91fab91..2bbdce4 100644
--- a/main/Extensions/AlertSheet.swift
+++ b/main/Extensions/AlertSheet.swift
@@ -2,19 +2,32 @@ import UIKit
 
 // MARK: Basic Alerts
 
+/// - Parameters:
+///   - buttonText: Default: "Dismiss"
 func Alert(title: String?, text: String?, buttonText: String = "Dismiss") -> UIAlertController {
 	let alert = UIAlertController(title: title, message: text, preferredStyle: .alert)
 	alert.addAction(UIAlertAction(title: buttonText, style: .cancel, handler: nil))
 	return alert
 }
 
+/// - Parameters:
+///   - buttonText: Default: "Dismiss"
 func ErrorAlert(_ error: Error, buttonText: String = "Dismiss") -> UIAlertController {
 	return Alert(title: "Error", text: error.localizedDescription, buttonText: buttonText)
 }
 
-func AskAlert(title: String?, text: String?, buttonText: String = "Continue", buttonStyle: UIAlertAction.Style = .default, action: @escaping () -> Void) -> UIAlertController {
+/// - Parameters:
+///   - buttonText: Default: "Dismiss"
+func ErrorAlert(_ errorDescription: String, buttonText: String = "Dismiss") -> UIAlertController {
+	return Alert(title: "Error", text: errorDescription, buttonText: buttonText)
+}
+
+/// - Parameters:
+///   - buttonText: Default: "Continue"
+///   - buttonStyle: Default: `.default`
+func AskAlert(title: String?, text: String?, buttonText: String = "Continue", buttonStyle: UIAlertAction.Style = .default, action: @escaping (UIAlertController) -> Void) -> UIAlertController {
 	let alert = Alert(title: title, text: text, buttonText: "Cancel")
-	alert.addAction(UIAlertAction(title: buttonText, style: buttonStyle) { _ in action() })
+	alert.addAction(UIAlertAction(title: buttonText, style: buttonStyle) { _ in action(alert) })
 	return alert
 }
 
diff --git a/main/Extensions/Generic.swift b/main/Extensions/Generic.swift
index b9888c5..226c86b 100644
--- a/main/Extensions/Generic.swift
+++ b/main/Extensions/Generic.swift
@@ -55,15 +55,11 @@ extension String {
 			ending = rld + "." + ending
 		}
 		return (domain: ending, host: parts.joined(separator: "."))
-		
-//		var allDots = enumerated().compactMap { $1 == "." ? $0 : nil }
-//		let d1 = allDots.popLast() // we dont care about TLD
-//		guard let d2 = allDots.popLast() else {
-//			return (domain: self, host: nil) // no subdomains, just plain SLD
-//		}
-//		// TODO: check third level domains
-////		let d3 = allDots.popLast()
-//		return (String(suffix(count - d2 - 1)), String(prefix(d2)))
+	}
+	/// Returns `true` if String matches list of known second level domains (e.g., `co.uk`).
+	func isKnownSLD() -> Bool {
+		let parts = components(separatedBy: ".")
+		return parts.count == 2 && listOfSLDs[parts.last!]?[parts.first!] ?? false
 	}
 }
 
diff --git a/main/Settings/TVCFilter.swift b/main/Settings/TVCFilter.swift
index 47d48d9..2125f38 100644
--- a/main/Settings/TVCFilter.swift
+++ b/main/Settings/TVCFilter.swift
@@ -18,6 +18,27 @@ class TVCFilter: UITableViewController, EditActionsRemove {
 		tableView.reloadData()
 	}
 	
+	@IBAction private func addNewFilter() {
+		let desc: String
+		switch currentFilter {
+		case .blocked: desc = "Enter the domain name you wish to block."
+		case .ignored: desc = "Enter the domain name you wish to ignore."
+		default: return
+		}
+		let alert = AskAlert(title: "Create new filter", text: desc, buttonText: "Add") {
+			guard let dom = $0.textFields?.first?.text else {
+				return
+			}
+			guard dom.contains("."), !dom.isKnownSLD() else {
+				ErrorAlert("Entered domain is not valid. Filter can't match country TLD only.").presentIn(self)
+				return
+			}
+			DBWrp.updateFilter(dom, add: self.currentFilter)
+		}
+		alert.addTextField { $0.placeholder = "cdn.domain.tld" }
+		alert.presentIn(self)
+	}
+	
 	// MARK: - Table View Delegate
 	
 	override func tableView(_ _: UITableView, numberOfRowsInSection _: Int) -> Int { dataSource.count }
diff --git a/main/Settings/TVCSettings.swift b/main/Settings/TVCSettings.swift
index f8bf742..d2026b9 100644
--- a/main/Settings/TVCSettings.swift
+++ b/main/Settings/TVCSettings.swift
@@ -56,7 +56,7 @@ class TVCSettings: UITableViewController {
 		AskAlert(title: "Clear results?", text: """
 			You are about to delete all results that have been logged in the past. Your preference for blocked and ignored domains is preserved.
 			Continue?
-		""", buttonText: "Delete", buttonStyle: .destructive) {
+		""", buttonText: "Delete", buttonStyle: .destructive) { _ in
 			DBWrp.deleteHistory()
 		}.presentIn(self)
 	}