devtools.inspectedWindow.tabId

The ID of the tab that this instance of the devtools is attached to, represented as a number.

This can be sent to the add-on's background page, so that background page can use the tabs API to interact with the tab:

// devtools-panel.js

const scriptToAttach = "document.body.innerHTML = 'Hi from the devtools';";

attachContentScriptButton.addEventListener("click", () => {
  browser.runtime.sendMessage({
    tabId: browser.devtools.inspectedWindow.tabId,
    script: scriptToAttach
  });
});
// background.js

function handleMessage(request, sender, sendResponse) {
  browser.tabs.executeScript(request.tabId, {
    code: request.script
  });
}

browser.runtime.onMessage.addListener(handleMessage);

Browser compatibility

Chrome Edge Firefox Firefox for Android Opera
Basic support Yes No 54 No Yes

Acknowledgements

This API is based on Chromium's chrome.devtools API.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

 Contributors to this page: wbamberg
 Last updated by: wbamberg,