gx mod making dosent work

[luke0394]

i was making a mod and it dintent work it was just defult even thuo i followed a tatorel but oprea siad that Manifest is not valid JSON. trailing comma at line 22 column 13
Could not load manifest. how to fix and sorry for bad spelling here are my files plese fix and send the fixed back

[luke0394]

sorry plese just send me a new manifest heres mine {
"name": "my first",
"description": "well my actull fist didnt work",
"developer":
{
"name": "Lucas or Luke0394"
},
"icons":
{
"512": "icon_512.png"
},
"manifest_version": 3,
"mod":
{
"license": "license.txt",
"payload":
{
"background_music":
[
"music/1.mp4",

        ],
        "browser_sounds":
        {
            "CLICK":
            [
                "sound/click.mp3"
            ],
            "FEATURE_SWITCH_OFF":
            [
                "sound/feature_switch_off.mp3"
            ],
            "FEATURE_SWITCH_ON":
            [
                "sound/feature_switch_on.mp3"
            ],
            "HOVER":
            [
                "sound/hover.mp3"
            ],
            "HOVER_UP":
            [
                "sound/hover.mp3"
            ],
            "IMPORTANT_CLICK":
            [
                "sound/important_click.mp3"
            ],
            "LEVEL_UPGRADE":
            [
                "sound/level_upgrade.mp3"
            ],
            "LIMITER_OFF":
            [
                "sound/limiter_off.mp3"
            ],
            "LIMITER_ON":
            [
                "sound/limiter_on.mp3"
            ],
            "SWITCH_TOGGLE":
            [
                "sound/switch.mp3"
            ],
            "TAB_CLOSE":
            [
                "sound/close_tab.mp3"
            ],
            "TAB_INSERT":
            [
                "sound/new_tab.mp3"
            ],
            "TAB_SLASH":
            [
                "sound/tab_slash.mp3"
            ]
        },
        "keyboard_sounds":
        {
            "TYPING_BACKSPACE":
            [
                "keyboard/backspace.wav"
            ],
            "TYPING_ENTER":
            [
                "keyboard/enter.wav"
            ],
            "TYPING_LETTER":
            [
                "keyboard/letter_1.wav",
                "keyboard/letter_2.wav",
                "keyboard/letter_3.wav"
            ],
            "TYPING_SPACE":
            [
                "keyboard/space.wav"
            ]
        },
        "page_styles":
        [
            {
                "css":
                [
                    "webmodding/opera.css"
                ],
                "matches":
                [
                    "https://*.opera.com/*"
                ]
            }
        ],
        "shaders":
        {
            "Matrix green":
            {
                "path": "shader/matrix.txt"
            },
            "Wave":
            {
                "animation":
                {
                    "duration": 60,
                    "steps": 3600
                },
                "path": "shader/wave.txt"
            }
        },
        "theme":
        {
            "dark":
            {
                "gx_accent":
                {
                    "h": 85,
                    "s": 100,
                    "l": 72
                },
                "gx_secondary_base":
                {
                    "h": 272,
                    "s": 64,
                    "l": 16
                }
            },
            "light":
            {
                "gx_accent":
                {
                    "h": 112,
                    "s": 80,
                    "l": 44
                },
                "gx_secondary_base":
                {
                    "h": 272,
                    "s": 32,
                    "l": 16
                }
            }
        },
        "wallpaper":
        {
            "dark":
            {   
                "image": "wallpaper/dark.png",
                "text_color": "#FFFFFF",
                "text_shadow": "#757575"
            },
            "light":
            {
                "image": "wallpaper/video.webm",
                "first_frame": "wallpaper/first_frame.jpeg",
                "text_color": "#FFFFFF",
                "text_shadow": "#0B000E"
            }
        }
    },
    "schema_version": 1
},
"version": "1.0"

}