Upload images to Imgur from Mybb 
1 Create your own API https://imgur.com/register/api_anon

2 Upload the files in the root of your MyBB forum

3 Open jscripts / editor.js and find:

4

Code:

{type: 'button', name: 'img', sprite: 'image', insert: 'image', extra: 1, title: this.options.lang.title_image},

5 Add after

Code:

{type: 'button', name: 'imgur', insert: 'imgur', image: 'imgurbut.png', title: 'Upload to Imgur'},

6 Find 

Code:

insertIMG: function()    {        image = prompt(this.options.lang.enter_image, "http://");        if(image)        {            this.performInsert("[img]"+image+"[/img]", "", true);        }    },

7 Add after 

Code:

insertImgur: function()    {        MyBB.popupWindow('imgur.php', 'imgur', 240, 200);    },

8 Find

Code:

case "image":                this.insertIMG();                break;

Add after

Code:

case "imgur":                this.insertImgur();                break;
