webRequest.StreamFilter.error
A string that will contain an error message after the onerror event has fired.
Examples
This example adds an onerror listener which logs the value of error.
js
function listener(details) {
let filter = browser.webRequest.filterResponseData("12345");
filter.onerror = (event) => {
console.log(`Error: ${filter.error}`);
};
// return {}; // not needed
}
browser.webRequest.onBeforeRequest.addListener(
listener,
{ urls: ["<all_urls>"], types: ["main_frame"] },
["blocking"],
);