Merge pull request 'Enable e2e testing on Firefox' (#2439) from maltejur/forgejo:e2e_firefox into forgejo

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/2439
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>

playwright.config.js

@@ -64,13 +64,12 @@ export default {
       },
     },
 
-    // disabled because of https://github.com/go-gitea/gitea/issues/21355
+    {
-    // {
+      name: 'firefox',
-    //   name: 'firefox',
+      use: {
-    //   use: {
+        ...devices['Desktop Firefox'],
-    //     ...devices['Desktop Firefox'],
+      },
-    //   },
+    },
-    // },
 
     {
       name: 'webkit',