Select some available builds for l10n download tests (#16781)

Author: janbrasna

tests/functional/conftest.py

@@ -95,7 +95,7 @@ def pytest_generate_tests(metafunc):
             product_urls = [a.attrib["href"] for a in doc("ul.c-product-list a")]
             # FIXME: sanity checks after first scene is redirected to FXC:
             if product_urls and product_urls[0].startswith("/en-US/download/all/"):
-                product_urls = ["/en-US/firefox/all/desktop-release/", "/en-US/firefox/all/desktop-nightly/"]
+                product_urls = ["/en-US/firefox/all/desktop-release/", "/en-US/firefox/all/desktop-esr/"]
             # If product url links outside of /firefox/all/ ignore it. (e.g. testflight)
             product_urls = [url for url in product_urls if url.startswith("/en-US/firefox/all/")]
             for url in product_urls: