Chrome console: "Refused to autofill iframe with different origin"

Question

I'm getting the above error in the Chrome (but not FF) JS console. It seems to be related to the Twitter widgets (the standard "Tweet" and "Follow @username" buttons), because it goes away when I comment them out.

The widget markup is just a <a>, and gets turned into an iframe by a process I don't fully understand, especially since the error persists when I comment out the Twitter JS that presumably makes this happen.

Error in full:

Refused to autofill iframe with different origin   onloadwff.js:78
  console_error                                    onloadwff.js:78
  fillfield                                        onloadwff.js:183
  receiveBG                                        onloadwff.js:125
  EventImpl.dispatchToListener                     extensions::event_bindings:397
  publicClass.(anonymous function)                 extensions::utils:89
  EventImpl.dispatch_                              extensions::event_bindings:379
  EventImpl.dispatch                               extensions::event_bindings:403
  publicClass.(anonymous function)                 extensions::utils:89
  dispatchOnMessage                                extensions::messaging:304

Answer 1

The LastPass extension was causing this for me. Temporarily disabled, and the errors went away.