.eslintrc.json

{
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "script"
    },
    "globals": {
         "gStrVersionKey": true,
         "gStrPreviousSessionTimeKey": true,
         "gMapDefaultValues": true,
         "gStrDbName": true,
         "gNumDbVersion": true,
         "gStrDbHistoryName": true,
         "gStrDbDataURIName": true,
         "gStrDbPageInfoName": true,
         "gStrDbSessionName": true,
         "gStrDbSavedSessionName": true,
         "gObjDbCreateStores": true,
         "gStrExtensionExcludeUrl": true,
         "gStrChromeExcludeUrl": true,
         "gStrTranslationPath": true,
         "gStrGetScrollPosScript": true,
         "gMapIcons": true,
         "gStrBlankUrl": true,
         "gStrOptionPage": true,
         "gStrChangeHistory": true,
         "gStrDeleteIconPath": true,
         "UPDATE_CONFIRM_DIALOG": true,
         "RESTORE_PREVIOUS_SESSION": true,
         "gNumUpdateCheckTime": true,

         "DISABLE_AUTOPURGE": true,
         "INVALID_EXCLUDE": true,
         "KEYBIND_EXCLUDE": true,
         "NORMAL": true,
         "USE_EXCLUDE": true,
         "TEMP_EXCLUDE": true,
         "EXTENSION_EXCLUDE": true,
         "CHROME_EXCLUDE": true,
         "EXTENSION_ICON_38": true,
         "EXTENSION_ICON_48": true,
         "EXTENSION_ICON_128": true,

         "sleep": true,
         "escapeForRegExp": true,
         "decodeForRegExp": true,
         "closureCreateMapObserve": true,
         "ajax": true,
         "loadTranslation": true,
         "closureCreateBeep": true,
         "getSplitURI": true,
         "getListAfterJoinHistoryDataOnDB": true,
         "getHistoryListFromIndexedDB": true,
         "getQueryString": true,
         "getDataURI": true,
         "hasStringOfAttributeOfElement": true,
         "addStringToAttributeOfElement": true,
         "removeStringFromAttributeOfElement": true,
         "keyCheck": true,
         "generateKeyString": true,
         "toType": true,
         "formatDate": true,
         "setObjectProperty": true
    },
    "env": {
        "browser": true,
        "commonjs": true,
        "node": true,
        "es6": true,
        "webextensions": true
    },
    "rules": {
        "comma-dangle": "off",
        "no-console": "off",

        "array-callback-return": "error",
        "curly": "error",
        "dot-location": ["error", "property"],
        "eqeqeq": "error",
        "guard-for-in": "error",
        "no-caller": "error",
        "no-div-regex": "error",
        "no-eq-null": "error",
        "no-eval": "error",
        "no-extend-native": "error",
        "no-extra-bind": "error",
        "no-extra-label": "warn",
        "no-lone-blocks": "warn",
        "no-loop-func": "warn",
        "no-native-reassign": "error",
        "no-new": "warn",
        "no-new-func": "warn",
        "no-throw-literal": "error",
        "no-unused-labels": "error",
        "no-unused-vars": "warn",
        "no-useless-call": "error",
        "no-useless-concat": "warn",
        "no-useless-escape": "warn",
        "radix": "warn",
        "yoda": "warn",
        "max-len": ["error", {"code": 80, "tabWidth": 4, "ignoreUrls": true}]
    }
}