RangeError: Unable to activate file, likely provider was destroyed

[RangerMauve]

This is happening for me with 0.3.0 whenever I try to open a dat using localhost and dat-js in Firefox Nightly.

Any idea what might be causing this, or how I should debug it?

Stack Trace

RangeError: Unable to activate file, likely provider was destroyed random-access-idb-mutable-file.js:330:12
    activate random-access-idb-mutable-file.js:330
    stat random-access-idb-mutable-file.js:212
    perform random-access-idb-mutable-file.js:267
    awake random-access-idb-mutable-file.js:240
    schedule random-access-idb-mutable-file.js:248
    _open random-access-idb-mutable-file.js:281
    open index.js:69
    _open index.js:181
    _run index.js:208
    queueAndRun index.js:227
    open index.js:75
    run index.js:98
    write index.js:53
    open storage.js:253
    callback index.js:162
    nextTickCallback index.js:260
    run browser.js:153
    drainQueue browser.js:123