Entrevista
summary
Step-by-step guide to build real browser extensions using WebExtensions API with plain JavaScript, HTML and CSS, including a content-script page modifier, a background script that handles events, and a popup UI; demo shows three working extensions that add keyboard shortcuts, modify page layout, and inject contextual tooltips; covers packaging and publishing to Chrome Web Store and Mozilla Add-ons and how to debug using browser devtools so the extensions actually run and update without tearing down the page.
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