Bug 1710356 - Removed hardcoded product name. r=whimboo,webdriver-reviewers

Removed hardcoded product name as firefox in "Browser.getVersion in remote/cdp/domains/parent/Browser.jsm
Also updated tests at:
- remote/cdp/test/browser/browser_cdp.js
- remote/cdp/test/browser/browser_main_target.js

Differential Revision: https://phabricator.services.mozilla.com/D120759

remote/cdp/domains/parent/Browser.jsm

@@ -26,7 +26,7 @@ class Browser extends Domain {
     ].getService(Ci.nsIHttpProtocolHandler);
     return {
       protocolVersion: "1.3",
-      product: (isHeadless ? "Headless " : "") + "Firefox",
+      product: (isHeadless ? "Headless " : "") + Services.appinfo.name,
       revision: "1",
       userAgent,
       jsVersion: "1.8.5",

remote/cdp/test/browser/browser_cdp.js

@@ -17,7 +17,7 @@ add_task(async function testCDP({ client }) {
   );
   is(
     version.product,
-    isHeadless ? "Headless Firefox" : "Firefox",
+    isHeadless ? "Headless Firefox" : Services.appinfo.name,
     "Browser.getVersion works and depends on headless mode"
   );
   is(

remote/cdp/test/browser/browser_main_target.js

@@ -27,7 +27,9 @@ add_task(async function({ CDP }) {
     const { isHeadless } = Cc["@mozilla.org/gfx/info;1"].getService(
       Ci.nsIGfxInfo
     );
-    const expectedProduct = isHeadless ? "Headless Firefox" : "Firefox";
+    const expectedProduct = isHeadless
+      ? "Headless Firefox"
+      : Services.appinfo.name;
     is(version.product, expectedProduct, "Browser.getVersion works");
 
     const { webSocketDebuggerUrl } = await CDP.Version();