Bookrmarklet to add or modify meta viewport to allow resizing on mobile.

resize-allow.js

var d=document;
var q=d.querySelector.bind(d);
var c='width=device-width,initial-scale=1';
var v=q('meta[name=viewport]');
if(v){
	v.content=c
}else{
	v=d.createElement('meta');
	v.name='viewport';
	v.content=c;
	q('head').appendChild(v);
}
// Bookmarklet version
/*
javascript:(function()%7Bvar%20d%3Ddocument%3Bvar%20q%3Dd.querySelector.bind(d)%3Bvar%20c%3D'width%3Ddevice-width%2Cinitial-scale%3D1'%3Bvar%20v%3Dq('meta%5Bname%3Dviewport%5D')%3Bif(v)%7Bv.content%3Dc%7Delse%7Bv%3Dd.createElement('meta')%3Bv.name%3D'viewport'%3Bv.content%3Dc%3Bq('head').appendChild(v)%3B%7D%7D)()
*/