@seanmcken,

Error: Insufficient information.

You need at least a name and a value. You've posted (presumably) two values. Normally you'd also need the hostname (unless you want the browser to send that cookie to every server). An expiry date is also nice to have, but not required.

Once you have that, grab ~/.mozilla/microb/cookies.sqlite

and use a SQLite editor to delete/edit/insert cookies. Then place the updated file back in the above folder.