I also would like to know how to trigger this prompt. I had installed Grammarly and right after that, it prompted me to grant permissions to 600+ hosts... How can I trigger a similar permissions "bar"?

Update: @bramiam Not sure, but have you tried with a real device? In the simulator, my extension doesn't ask about additional permissions, but I tried it on the real device and it requested permissions... From my manifest: "content_scripts": [{     "run_at": "document_idle",     "all_frames": true,     "match_about_blank": true,     "js": [ "xxx.js" ],     "css": [ "xxx.css" ],     "matches": [ "<all_urls>" ]   },{     "js": [ "xxx.js" ],     "matches": [ "<all_urls>" ] }], "permissions": [     "tabs",     "cookies",     "storage",     "https://xxxxxxx.com",     "http://*/*",     "https://*/*" ],