New posts in Content Script

What exactly are content script and background script in the Chrome extension?

Chrome extension set to `run_at` `document_start` is running too fast?

Optionally inject Content Script

Why is chrome.cookies undefined in a content script?

$x() function is not defined inside a Chrome extension, content script

sendMessage from extension background or popup to content script doesn't work

Overriding !important with css or jquery

Chrome extension content script re-injection after upgrade or install

Chrome extension adding external javascript to current page's html

My CSS is not getting injected through my content script