rules with https://github.com/FirefoxBar/HeaderEditor

HeaderEditor-zhwp with enwp.json

{
	"request": [
		{
			"enable": 0,
			"name": "zhwp with enwp 1",
			"ruleType": "redirect",
			"matchType": "regexp",
			"pattern": "(https?:\\/\\/)zh(\\.m)?(\\.wikipedia\\.org)",
			"exclude": "",
			"isFunction": false,
			"action": "redirect",
			"to": "$1zh-en$2$3",
			"id": 15
		}
	],
	"sendHeader": [
		{
			"enable": 0,
			"name": "zhwp with enwp 2",
			"ruleType": "modifySendHeader",
			"matchType": "domain",
			"pattern": "zh-en.wikipedia.org",
			"exclude": "",
			"isFunction": false,
			"action": {
				"name": "Host",
				"value": "zh.wikipedia.org"
			},
			"id": 42,
			"code": "console.dir(val)"
		},
		{
			"enable": 0,
			"name": "zhwp with enwp 2-m",
			"ruleType": "modifySendHeader",
			"matchType": "domain",
			"pattern": "zh-en.m.wikipedia.org",
			"exclude": "",
			"isFunction": false,
			"action": {
				"name": "Host",
				"value": "zh.m.wikipedia.org"
			},
			"id": 43
		}
	],
	"receiveHeader": []
}