Where debating everything under the sun is only the beginning

I sometimes use 400-450% (reading large texts regularly), but except at the Opera is not possible anywhere else... I do not use it on all pages, but for some great texts that I read from a distance from the screen. It is very convenient and this feature is only in Opera.

Fix to width this is a great feature when the text pages at the zoom of 450% expanded horizontally (and it is impossible to read the text), this function places the text within the browser window. Also the only feature of the Opera.

// ==UserScript== 
// @name          Force Wrap 
// @namespace     http://zoolcar9.lhukie.net/mozilla/userscripts/ 
// @include       * 
// @exclude       http://mail.google.com/* 
// @description      Wrap text automatically. Based on Jesse Rudderman's Force Wrap bookmarklet (http://xrl.us/hsn3) 
// ==/UserScript== 
 
/* 
 Changelog: 
 - 20060109: 
   replaced innerHTML with insertBefore. Thanks to Jim Roberts 
 - 20060515: 
   replaced Jim’s codes with codes from MR Tech Link Wrapper 
   to fix regression in Firefox 2.0/3.0 dev builds. 
*/ 
 
function F(n) { 
  var u, r, c, x; 
  if(n.nodeType == 3) { 
    u = n.data.search(/\S{30}/); 
    if(u >= 0) { 
      r = n.splitText(u + 30); 
      n.parentNode.insertBefore(document.createElement('WBR'), r); 
    } 
  } else if(n.tagName != 'STYLE' && n.tagName != 'SCRIPT' && n.tagName != 'PRE') { 
    for (c = 0; x = n.childNodes[c]; ++c) { 
      F(x); 
    } 
  } 
} 
 
F(document.body); 
//document.body.parentNode.insertBefore(document.body, document.body); 
 
// Coded added to fix regression is Firefox 2.0/3.0 dev builds 
// Ripped from MR Tech Link Wrapper 2.0.2 
var thisE = document.body; 
var p = thisE.parentNode; 
var n = thisE.nextSibling; 
p.removeChild(thisE); 
p.insertBefore(thisE, n); 

About Zoom Page: Not sure why there should be a limit to it.

In Preferences > Content it's limited as low as 250%. I agree that this should be higher because something like 180% to 200% is simply the desired default display size on my UHD monitor. (On the flipside because you see more detail there's less desire to zoom in — I don't think I ever really do anymore.)