Javascript localstorage中保存的其他信息是什么

chrome保存在localstorage中的信息是什么？在任何情况下都可以使用吗？其他浏览器是否保留相同的功能？ 例如，我的控制台在

localStorage

请求时返回了该值（除了我故意放在那里的对象之外）：

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这些可能是通过页面中的任何其他脚本添加的。谷歌分析。啊，我想可能是AdBlock。。。

_at.hist.0607: "{"m":600,"k":2,"l":{"0":100,"1":42},"b":{"0":0,"1":1024,"2":0,"3":16,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0,"13":0,"14":0,"15":0,"16":0,"17":0,"18":0}}"

_at.hist.0609: "{"m":600,"k":2,"l":{"0":100,"1":42},"b":{"0":0,"1":1024,"2":0,"3":16,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0,"13":0,"14":0,"15":0,"16":0,"17":0,"18":0}}"
length: 7
se:fkey: "c122b51f4bd30fb5f605d53571e9e76d,1404789428"
yt-remote-connected-devices: "{"data":"[]","expiration":1402306854530,"creation":1402220454530}"
yt-remote-device-id: "{"data":"762ef7ce-f934-42cc-9abb-4647bf3bb68b","expiration":1430383329393,"creation":1398847329393}"