代码初始化

jiangping

2025-06-17 64fa2c33cd645e86d4e2a8c34c7881ea4aa678cf

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'use strict';
var userAgent = require('../internals/environment-user-agent');
 
var firefox = userAgent.match(/firefox\/(\d+)/i);
 
module.exports = !!firefox && +firefox[1];