"manifest_version" : 2, "name" : "Borderify", "version" : "1.0",
mandetory
"description": "Adds a red border to all webpages matching mozilla.org.", "icons": { "48": "icons/border-icon.svg", "96": "icons/border-icon.svg" },
optional but recommended
loads the boderify.Js file when a particular page is opened
"content_scripts": [ { "matches": ["*://*.mozilla.org/*"], "js": ["borderify.js"] } ]
document.body.style.border = "7px dashed #ffc3a0";
about:debugging
By Supriya kotturu
create your first add-on