Sibling not working for comma separated domains

[lyaaz]

In case of config:

custom mode:

{
    "a1.com": "test1",
    "b1.com,c1.com": "test2"
}

and sibling:

[
  ["a1.com", "a2.com"],
  ["b1.com", "b2.com"],
  ["c1.com", "c2.com"]
]

Then the extension only spoof ua for [a1, a2, b1, c1], but not working for [b2, c2].

UserAgent-Switcher/v2/firefox/common.js

Line 55 in 9c30326

const i = prefs.siblings[key];