Revert FXIOS-11882 ⁃ Restore "Show Link Previews" setting (#26155)

Revert "Remove FXIOS-11882 ⁃ Remove "Show Link Previews" setting (#25917)"

This reverts commit a7de37a.

Author: Foxbolts

BrowserKit/Sources/Shared/Prefs.swift

@@ -31,6 +31,7 @@ public struct PrefsKeys {
     public static let KeyDefaultBrowserCardShowType = "defaultBrowserCardShowType"
     public static let DidDismissDefaultBrowserMessage = "DidDismissDefaultBrowserCard"
     public static let KeyDidShowDefaultBrowserOnboarding = "didShowDefaultBrowserOnboarding"
+    public static let ContextMenuShowLinkPreviews = "showLinkPreviews"
     public static let ShowClipboardBar = "showClipboardBar"
     public static let BlockOpeningExternalApps = "blockOpeningExternalApps"
     public static let NewTabCustomUrlPrefKey = "HomePageURLPref"

firefox-ios/Client/Frontend/Browser/BrowserViewController/Extensions/BrowserViewController+WebViewDelegates.swift

@@ -220,6 +220,8 @@ extension BrowserViewController: WKUIDelegate {
 
     private func contextMenuPreviewProvider(for url: URL, webView: WKWebView) -> UIContextMenuContentPreviewProvider? {
         let provider: UIContextMenuContentPreviewProvider = {
+            guard self.profile.prefs.boolForKey(PrefsKeys.ContextMenuShowLinkPreviews) ?? true else { return nil }
+
             let previewViewController = ContextMenuPreviewViewController()
             previewViewController.view.isUserInteractionEnabled = false
             let clonedWebView = WKWebView(frame: webView.frame, configuration: webView.configuration)

firefox-ios/Client/Frontend/Settings/BrowsingSettingsViewController.swift

@@ -62,7 +62,17 @@ class BrowsingSettingsViewController: SettingsTableViewController, FeatureFlagga
                 statusText: String(format: .SettingsOfferClipboardBarStatus, AppName.shortName.rawValue)
             )
 
-            linksSettings += [offerToOpenCopiedLinksSettings]
+            let showLinksPreviewSettings = BoolSetting(
+                prefs: profile.prefs,
+                theme: theme,
+                prefKey: PrefsKeys.ContextMenuShowLinkPreviews,
+                defaultValue: true,
+                titleText: .SettingsShowLinkPreviewsTitle,
+                statusText: .SettingsShowLinkPreviewsStatus
+            )
+
+            linksSettings += [offerToOpenCopiedLinksSettings,
+                              showLinksPreviewSettings]
 
             let blockOpeningExternalAppsSettings = BoolSetting(
                 prefs: profile.prefs,

firefox-ios/Shared/Strings.swift

@@ -3536,6 +3536,20 @@ extension String {
         comment: "Description displayed under the ”Offer to Open Copied Link” option. See https://bug1223660.bmoattachments.org/attachment.cgi?id=8898349. %@ is for the app name.")
 }
 
+// MARK: - Link Previews
+extension String {
+    public static let SettingsShowLinkPreviewsTitle = MZLocalizedString(
+        key: "Settings.ShowLinkPreviews.Title",
+        tableName: nil,
+        value: "Show Link Previews",
+        comment: "Title of setting to enable link previews when long-pressing links.")
+    public static let SettingsShowLinkPreviewsStatus = MZLocalizedString(
+        key: "Settings.ShowLinkPreviews.StatusV2",
+        tableName: nil,
+        value: "When long-pressing links",
+        comment: "Description displayed under the ”Show Link Previews” option")
+}
+
 // MARK: - Block Opening External Apps
 extension String {
     public static let SettingsBlockOpeningExternalAppsTitle = MZLocalizedString(
@@ -7182,16 +7196,6 @@ extension String {
                 tableName: nil,
                 value: "Last month",
                 comment: "This label is meant to signify the section containing a group of items from the past thirty days.")
-            public static let SettingsShowLinkPreviewsTitle = MZLocalizedString(
-                key: "Settings.ShowLinkPreviews.Title",
-                tableName: nil,
-                value: "Show Link Previews",
-                comment: "Title of setting to enable link previews when long-pressing links.")
-            public static let SettingsShowLinkPreviewsStatus = MZLocalizedString(
-                key: "Settings.ShowLinkPreviews.StatusV2",
-                tableName: nil,
-                value: "When long-pressing links",
-                comment: "Description displayed under the ”Show Link Previews” option")
         }
         struct v139 {
             public static let PagesCount = MZLocalizedString(