[js] Attempt to de-flake a test with a hard sleep (yuck)
@@ -217,6 +217,7 @@ suite(function(env) {
await verifyWebExtensionNotInstalled();
let id = await driver.installAddon(WEBEXTENSION_EXTENSION);
+ await driver.sleep(1000); // Give extension time to install (yuck).
await driver.get(Pages.echoPage);
await verifyWebExtensionWasInstalled();
