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windows.remove() - Mozilla | MDN

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Syntax

js
let removing = browser.windows.remove(
  windowId        // integer
)

Parameters

windowId

integer. ID of the window to close.

Return value

A Promise that will be fulfilled with no arguments when the window has been closed. If any error occurs, the promise will be rejected with an error message.

Examples

When the user clicks a browser action's icon, close the window in which the icon was clicked:

js
function onRemoved() {
  console.log(`Removed window`);
}

function onError(error) {
  console.error(`Error:`, error);
}

browser.browserAction.onClicked.addListener((tab) => {
  let removing = browser.windows.remove(tab.windowId);
  removing.then(onRemoved, onError);
});

Close the current, e.g., popup, window when the user clicks a button on the page:

js
// in a script loaded by the page in the window
document.querySelector("#close").addEventListener(async ({ button }) => {
  try {
    if (button) return; // not a left click
    const windowId = (await browser.windows.getCurrent()).id;
    await browser.windows.remove(windowId);
    // this point will never be reached, since the window is gone
  } catch (error) {
    console.error("Closing failed:", error);
  }
});

In Firefox, the same could be achieved with the .allowScriptsToClose window creation property and window.close().