chrome://extensions
eclajhagmjdnniapeipnfejgmplgehme
) from appeared extension card. manifest.json
file for default_popup
value (e.g. src/page_action/page_action.html
)page.goto
with URL like chrome-extension://EXTENSION_ID/EXTENSION_RELATIVE_URL (e.g. chrome-extension://eclajhagmjdnniapeipnfejgmplgehme/src/page_action/page_action.html
)page.screenshot
to take a screenshot when the extension HTML is loaded