diff --git a/src/background.ts b/src/background.ts
index 22787b8..f1a72a4 100644
--- a/src/background.ts
+++ b/src/background.ts
@@ -29,6 +29,7 @@ let ports: { [key: number]: Runtime.Port } = {};
 const responseMap: Map<string, { server: RequestInfo, response: IMAGEResponse, request: IMAGERequest }> = new Map();
 var serverUrl: RequestInfo;
 var renderingsPanel: browser.Windows.Window | browser.Tabs.Tab;
+var errorPanel: browser.Windows.Window | browser.Tabs.Tab;
 let launchPad : browser.Windows.Window | browser.Tabs.Tab;
 var graphicUrl: string = "";
 var extVersion = process.env.NODE_ENV;
@@ -197,13 +198,15 @@ async function handleMessage(p: Runtime.Port, message: any) {
               "body": JSON.stringify(query)
             });
             windowsPanel ? browser.windows.remove(progressWindow.id!) : browser.tabs.remove(progressWindow.id!);
+            // close existing error panel if it exists
+            windowsPanel ? (errorPanel && browser.windows.remove(errorPanel.id!)) : (errorPanel && browser.tabs.remove(errorPanel.id!));
             if (resp.ok) {
               json = await resp.json();
             } else {
-              windowsPanel ? browser.windows.create({
+              errorPanel = windowsPanel ? await browser.windows.create({
                 type: "panel",
                 url: "errors/http_error.html"
-              }) : browser.tabs.create({
+              }) : await browser.tabs.create({
                 url: "errors/http_error.html",
               });
               console.error(`HTTP Error ${resp.status}: ${resp.statusText}`);
@@ -213,10 +216,12 @@ async function handleMessage(p: Runtime.Port, message: any) {
             }
           } catch {
             windowsPanel ? browser.windows.remove(progressWindow.id!) : browser.tabs.remove(progressWindow.id!);
-            windowsPanel ? browser.windows.create({
+            // close existing error panel if it exists
+            windowsPanel ? (errorPanel && browser.windows.remove(errorPanel.id!)) : (errorPanel && browser.tabs.remove(errorPanel.id!));
+            errorPanel = windowsPanel ? await browser.windows.create({
               type: "panel",
               url: "errors/http_error.html"
-            }) : browser.tabs.create({
+            }) : await browser.tabs.create({
               url: "errors/http_error.html",
             });
             return;
@@ -811,6 +816,7 @@ browser.contextMenus.onClicked.addListener((info, tab) => {
     }
   } else {
     console.error("No tab passed to context menu listener!");
+    windowsPanel ? (errorPanel && browser.windows.remove(errorPanel.id!)) : (errorPanel && browser.tabs.remove(errorPanel.id!));
     windowsPanel ? browser.windows.create({
       type: "panel",
       url: "errors/http_error.html"
diff --git a/src/options/options.css b/src/options/options.css
index c74176e..b4afd2d 100644
--- a/src/options/options.css
+++ b/src/options/options.css
@@ -241,4 +241,16 @@
    padding: 1rem;
    border: 2px solid lightgrey;
    margin: 0.5rem 0rem;
- }
\ No newline at end of file
+ }
+
+/* High contrast mode support */
+@media (forced-colors: active) {
+  .slider {
+    background-color: Canvas;
+    border: 1px solid CanvasText;
+    forced-color-adjust: none;
+  }
+  .slider::before {
+    background-color: CanvasText;
+  }
+}
diff --git a/src/options/options.ts b/src/options/options.ts
index e287dbf..c2562e5 100644
--- a/src/options/options.ts
+++ b/src/options/options.ts
@@ -80,6 +80,7 @@ function optionsCheck(){
       alertMessage = browser.i18n.getMessage("perferencesSaved");
     }
     announcer!.textContent = alertMessage;
+    window.alert(alertMessage)
     setTimeout(() => {
       announcer!.textContent = '';
     }, 1000);