A Burp extension that filters out OPTIONS requests from populating Burp's Proxy history. This extension works by doing the following:

1. Force the Content-Type header value to text/css; charset=UTF-8.
2. Comment out the entire response body so Burp will not recognize the MIME type incorrectly.

A post about this extension can be found post.

Install the extension from the BApp Store.

1. Download burp-filter-options-method.py to your machine.
2. Go to Extender > Extensions tab, then click on the Add button. On the new window, browse the location of burp-filter-options-method.py and click the Next button.

To filter out these OPTIONS requests, go to HTTP history > Filter by MIME type, and untick the CSS checkbox.