Revert "测试"

‘liusuyi’

2023-07-18 9f0d9e8358442d5d156a4e8aa1e8d6bd4960a6f9

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