diff --git a/README.md b/README.md
index 0a3eac5..546608d 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/darrena092)
  
 ## Overview
-HeaderTools is a versatile and user-friendly extension designed to provide users the capability to manipulate and inject request headers based on regex domain selectors.
+HeaderTools is a versatile and user-friendly browser extension supporting Chrome, Brave and Firefox designed to provide users the capability to manipulate and inject request headers based on regex domain selectors.
 
 This was largely created as a replacement for ModHeader due to the author's decision to include Adware in a recent update.
 
@@ -21,7 +21,7 @@ This was largely created as a replacement for ModHeader due to the author's deci
 * User-friendly Interface: The interface is designed to be intuitive and user-friendly, simplifying the process of creating and managing your rules.
  
 ## How to Use
-* Install the Extension: Add HeaderTools to your Chrome/Brave browser using the latest release from the releases page.
+* Install the Extension: Add HeaderTools to your Chrome/Brave browser using the latest release from the releases page (Firefox release pending review).
 * Open the Extension: Click on the HeaderTools icon in your browser's toolbar.
 * Create a Rule:
     * Click on the "New Rule" button to start creating a rule.
diff --git a/htlogo.png b/htlogo.png
deleted file mode 100644
index 8034b30..0000000
Binary files a/htlogo.png and /dev/null differ
diff --git a/htlogosq.png b/htlogosq.png
new file mode 100644
index 0000000..dd9accd
Binary files /dev/null and b/htlogosq.png differ
diff --git a/manifest.json b/manifest.json
index 764ae8a..d83ac74 100644
--- a/manifest.json
+++ b/manifest.json
@@ -5,7 +5,7 @@
   "version": "1.0",
   "browser_action": {
     "default_popup": "build/index.html",
-    "default_icon": "htlogo.png"
+    "default_icon": "htlogosq.png"
   },
   "permissions": [
     "webRequest", "webRequestBlocking", "storage", "<all_urls>"
diff --git a/service/background.js b/service/background.js
index 39aa9a5..a1ccbdc 100644
--- a/service/background.js
+++ b/service/background.js
@@ -1,4 +1,4 @@
-// Preload rules, as the extension API doesn't support blocking operations.
+// Preload rules, as the Chrome extension API doesn't support blocking operations.
 let cachedRules = [];
 
 function updateCachedRules() {
@@ -17,6 +17,13 @@ chrome.storage.onChanged.addListener((changes, namespace) => {
   }
 });
 
+// Cross browser support
+const extraInfoSpec = ["blocking", "requestHeaders"];
+if (typeof browser === "undefined") {
+    // Detect Chrome and add extraHeaders.
+    extraInfoSpec.push("extraHeaders");
+}
+
 chrome.webRequest.onBeforeSendHeaders.addListener(
   (details) => {
     cachedRules.forEach(rule => {
@@ -35,5 +42,5 @@ chrome.webRequest.onBeforeSendHeaders.addListener(
     return { requestHeaders: details.requestHeaders };
   },
   { urls: ["<all_urls>"] },
-  ["blocking", "requestHeaders", "extraHeaders"]
+  extraInfoSpec
 );
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