Volume Booster - Sound Amplifier (600% Louder)

{
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    "description": "__MSG_extensionDescription__",
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        "tabs"
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    "icons": {
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        "48": "icons\/icon48.png",
        "128": "icons\/icon128.png"
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    "action": {
        "default_popup": "popup\/popup.html",
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            "32": "icons\/icon32.png",
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    "content_scripts": [
        {
            "matches": [
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            "run_at": "document_idle"
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}