tabs.captureTab()
Creates a data URL encoding the image of an area of the given tab. You must have the<all_urls>permission to use this method.
This is an asynchronous function that returns aPromise.
Syntax
js
let capturing = browser.tabs.captureTab( tabId, // optional integer options // optional extensionTypes.ImageDetails)Parameters
tabIdOptionalinteger. ID of the tab to capture. Defaults to the active tab in the current window.optionsOptional
Return value
APromise that will be fulfilled with a data URL which encodes the captured image. May be assigned to the 'src' property of an HTML Image element for display. If any error occurs the promise will be rejected with an error message.
Examples
Capture an image of the active tab in the current window, with default settings:
js
function onCaptured(imageUri) { console.log(imageUri);}function onError(error) { console.log(`Error: ${error}`);}browser.browserAction.onClicked.addListener(() => { let capturing = browser.tabs.captureTab(); capturing.then(onCaptured, onError);});Browser compatibility
Note:This API is based on Chromium'schrome.tabs API. This documentation is derived fromtabs.json in the Chromium code.