Fetch refuses to make a request

Question

I am trying to make a cross-site GET request to REST API on another server, but I always get TypeError: Network request failed.

I have tried everything I could think of:

• the same request works on localhost, but fails when I replace IP with remote one
• using curl with the same remote URL address works
• tcpdump shows that no request is even attempted - nothing gets sent to remote server (and I double checked that tcpdump works)
• there is no request in Network tab and no additional error/warning message in Console tab of developer tools.

Checking fetch documentation doesn't show anything that could cause such failure. Any ideas?

Answer 1

Argh - I found the answer the minute I have posted the question. It's uMatrix plugin which does what it's expected to - blocks unwanted network requests.

I'll leave the question here if someone else in the future encounters a similar problem.