UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3423.2 Safari/537.36

Steps to reproduce the problem:
On a site linking an OpenSearchDescription
1. Use tab-to-search in the omnibox
2. Observe fetch events in the serviceworker

What is the expected behavior?
The suggestions url (eg: https://example.org/suggest.php?q={searchTerms}) is within the serviceWorker's scope, so should be handled.

What went wrong?
This type of request isn't handled by serviceworker.

Did this work before? No 

Does this work in other browsers? Yes

Chrome version: 68.0.3423.2  Channel: dev
OS Version: 
Flash Version: