browsingData.removeCache()

Clears the browser's cache.

Note that although this function can take a browsingData.RemovalOptions object, it will be ignored. The entire cache is always cleared when using this function.

This is an asynchronous function that returns a Promise.

removalOptionsOptional

object. A browsingData.RemovalOptions object. This parameter has no effect.

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

Clear the browser cache:

function onRemoved() {
  console.log("removed");
}

function onError(error) {
  console.error(error);
}

browser.browsingData.removeCache({}).
then(onRemoved, onError);