chore: Add contextOpenNewTab function to ZenSidebarManager

src/browser/base/content/ZenSidebarManager.mjs

@@ -433,6 +433,16 @@ var gZenBrowserManagerSidebar = {
     }
   },
 
+  contextOpenNewTab() {
+    let browser = this._getBrowserById(this.contextTab);
+    let data = this.sidebarData;
+    let panel = data.data[this.contextTab];
+    let url = (browser == null) ? panel.url : browser.currentURI.spec;
+    let tab = gBrowser.addTrustedTab(url);    
+    gBrowser.selectedTab = tab;
+        this.close();
+  },
+
   contextToggleMuteAudio() {
     let browser = this._getBrowserById(this.contextTab);
     if (browser.audioMuted) {

src/browser/base/content/zen-popupset.inc.xhtml

@@ -4,6 +4,7 @@
   <menuitem id="context_zenUnloadWebPanel" oncommand="gZenBrowserManagerSidebar.contextUnload();" data-l10n-id="zen-web-side-panel-context-unload"/>
   <menuitem id="context_zenToggleMuteWebPanel" oncommand="gZenBrowserManagerSidebar.contextToggleMuteAudio();"/>
   <menuitem id="context_zenToogleUAWebPanel" oncommand="gZenBrowserManagerSidebar.contextToggleUserAgent();"/>
+  <menuitem id="context_zenOpenNewTabWebPanel" oncommand="gZenBrowserManagerSidebar.contextOpenNewTab();" data-l10n-id="zen-web-side-panel-open-in-new-tab"/>
   <menuseparator/>
   <menuitem id="context_zenDeleteWebPanel" oncommand="gZenBrowserManagerSidebar.contextDelete();" data-l10n-id="zen-web-side-panel-context-delete"/>
 </menupopup>

src/browser/locales/en-US/browser/zen-web-side-panels.ftl

@@ -18,3 +18,6 @@ zen-web-side-panel-context-unload =
 zen-web-side-panel-context-delete =
     .label = Delete Web Panel
     .accesskey = D
+zen-web-side-panel-open-in-new-tab =
+    .label = Open in New Tab
+    .accesskey = N

src/browser/themes/shared/zen-icons/icons.css

@@ -724,6 +724,7 @@ menuitem[id="placesContext_deleteHost"],
 #context-copyvideourl,
 #context-copylink,
 #context-stripOnShareLink,
+#context_zenOpenNewTabWebPanel,
 #context-pdfjs-copy {
 	--menu-image: url("link.svg");
 }