The "URL Filter" field on the DevTools Network tab accepts certain keywords to allow filtering by values other than the URL:
A list of those keywords can be found here.
Many of the keywords correspond exactly to the column headings displayed on the Network tab, and those that don't at least begin with the same letter as the column heading, so that, as you type, the input hint guides you to the correct keyword.
The one exception is the keyword "mime-type", which can be used to filter by values displayed in the "Type" column (which originate from the "content-type" response headers).
Since typing neither "type" nor "content-type" into the input field results in the necessary hint to reveal the actual keyword ("mime-type"), I find myself having to keep revisiting the documentation to find the keyword.
Having a keyword alias "type" for the "mime-type" filter keyword would help alot.
(i.e. being able to enter either "mime-type:text/html" -or- "type:text/html")
