z64 I have more data (still using latest Firefox plugin version 0.7.4)
This request failed with the 401 from before:
GET /summarizer/?url=https%3A//www.youtube.com/watch%3Fv%3Dredacted HTTP/2
Host: kagi.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate, br, zstd
Referer: https://kagi.com/videos?q=redacted
DNT: 1
Sec-GPC: 1
Connection: keep-alive
Cookie: _kagi_search_=redacted; kagi_session=redacted; _tracking_consent=redacted; _shopify_y=redacted
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Authorization: redacted
Priority: u=0, i
Pragma: no-cache
Cache-Control: no-cache
After disabling the plugin and retrying, I had a successful request that replaced the Authorization header with Sec-Fetch-User: ?1 (otherwise identical)