diff --git a/app/src/main.ts b/app/src/main.ts
index 390af21..7fede7a 100644
--- a/app/src/main.ts
+++ b/app/src/main.ts
@@ -29,6 +29,21 @@ if (require('electron-squirrel-startup')) {
 
 const appArgs = JSON.parse(fs.readFileSync(APP_ARGS_FILE_PATH, 'utf8'));
 
+// Take in a URL on the command line as an override
+if (process.argv.length > 1) {
+  const maybeUrl = process.argv[1];
+  try {
+    new URL(maybeUrl);
+    appArgs.targetUrl = maybeUrl;
+    console.info('Loading override URL passed as argument:', maybeUrl);
+  } catch (err) {
+    console.error(
+      'Not loading override URL passed as argument, because failed to parse:',
+      maybeUrl,
+    );
+  }
+}
+
 // Nativefier is a browser, and an old browser is an insecure / badly-performant one.
 // Given our builder/app design, we currently don't have an easy way to offer
 // upgrades from the app themselves (like browsers do).