How to disable viewport zooming on websites?

Not quite, if you were on a desktop browser, where you could use a so called "web inspector" to remove the code on-the-fly.
On mobile, things are different, and unless something like this (cumbersome), or a proxy works, then you are pretty much out of luck, because of the inability to say, install extensions to mobile browsers.

I read sometime about having to enable zoom on accessibility settings to override the metatag (aka ignore it), but I'm not sure if it works or not, never tested it and every time I've had to deal with what you are, I forget to test it.

 

Here's a bookmarklet I just put together that wil accomplish this. The only bad part is that it would need to be applied for every successive page view.

Code:

javascript:var meta=document.createElement('meta');
meta.name='viewport';meta.content='width=device-width, user-scalable=no';document.getElementsByTagName('head').item(0).appendChild(meta);alert('Zooming disabled.');

 

Copy and paste it in the address bar when you're viewing the page you want to modify. Or you can save it as a bookmark which will accomplish the same thing.