unable to rename folder

[atomGit]

ff v99.*
sRSS v2.23.2

i have allot of feeds and several "folders" and am unable to rename any of the folders (R-click > properties) - pressing 'ok' after changing the name does nothing - following is console output after clicking 'ok'

12:55:35.750 Uncaught TypeError: document.querySelector(...) is null
    saveData moz-extension://47f9cd7b-9fa3-4f66-9067-0c0c6a1b6264/scripts/app/views/Properties.js:30
    handleClick moz-extension://47f9cd7b-9fa3-4f66-9067-0c0c6a1b6264/scripts/app/views/Properties.js:18
    jQuery 2
Properties.js:30:46
    saveData moz-extension://47f9cd7b-9fa3-4f66-9067-0c0c6a1b6264/scripts/app/views/Properties.js:30
    handleClick moz-extension://47f9cd7b-9fa3-4f66-9067-0c0c6a1b6264/scripts/app/views/Properties.js:18
    handleClick self-hosted:1121
    jQuery 2