Another Firefox Dark Theme

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Another Firefox Dark Theme",
  "version": "1.3.1",
  "description": "An attempt to mimic the dark mode of Firefox Quantum. Use with Chrome's dark mode for the best results.",
  "icons": {
    "128": "images/icon128x128.png"
  },
  "theme": {
    "colors": {
      "frame": [
        12,
        12,
        13
      ],
      "frame_inactive": [
        60,
        64,
        67
      ],
      "frame_incognito": [
        12,
        12,
        13
      ],
      "frame_incognito_inactive": [
        60,
        64,
        67
      ],
      "ntp_background": [
        42,
        42,
        46
      ],
      "ntp_text": [
        255,
        255,
        255
      ],
      "tab_text": [
        255,
        255,
        255
      ],
      "bookmark_text": [
        255,
        255,
        255
      ],
      "toolbar": [
        50,
        50,
        52
      ]
    },
    "images": {
      "theme_toolbar": "images/toolbar.png",
      "theme_ntp_background": "images/ntp_background.png"
    },
    "properties": {
      "ntp_background_repeat": "no-repeat",
      "ntp_logo_alternate": 0
    },
    "tints": {
      "buttons": [
        -1,
        -1,
        0.96
      ]
    }
  }
}