Can't get Firefox extension logs to show up - firefox-addon

Question

Following these instructions, I went to about:debugging -> This Firefox and clicked Inspect on my extension, which shows a console. But no logs show up there when I trigger my extension. Using the list-cookies example, I added the last two lines:
gettingAllCookies.then((cookies) => {
//set the header of the panel
var activeTabUrl = document.getElementById('header-title');
var text = document.createTextNode("Cookies at: "+tab.title);
var cookieList = document.getElementById('cookie-list');
console.log('I can't see this log!');
cookieList.parentNode.appendChild(document.createTextNode(Date()));
When I invoke the popup, I see the current date/time in the popup, but no log shows up in the console.
I tried setting extensions.sdk.console.logLevel and restarting as mentioned here (even though I think that's for older versions), but it didn't help.
I thought maybe there's a console permission or something I might need to add to the manifest, but didn't find any such thing.
Complete code for reference. I only changed the lines marked with +/-:
function showCookiesForTab(tabs) {
//get the first tab object in the array
let tab = tabs.pop();
//get all cookies in the domain
var gettingAllCookies = browser.cookies.getAll({url: tab.url});
gettingAllCookies.then((cookies) => {
//set the header of the panel
var activeTabUrl = document.getElementById('header-title');
var text = document.createTextNode("Cookies at: "+tab.title);
var cookieList = document.getElementById('cookie-list');
- activeTabUrl.appendChild(text);
+
+ console.log('I can't see this log!');
+ cookieList.parentNode.appendChild(document.createTextNode(Date())); // I see this updated even though I don't see the log
if (cookies.length > 0) {
//add an <li> item with the name and value of the cookie to the list
for (let cookie of cookies) {
let li = document.createElement("li");
let content = document.createTextNode(cookie.name + ": "+ cookie.value);
li.appendChild(content);
cookieList.appendChild(li);
}
} else {
let p = document.createElement("p");
let content = document.createTextNode("No cookies in this tab.");
let parent = cookieList.parentNode;
p.appendChild(content);
parent.appendChild(p);
}
});
}
//get active tab to run an callback function.
//it sends to our callback an array of tab objects
function getActiveTab() {
return browser.tabs.query({currentWindow: true, active: true});
}
getActiveTab().then(showCookiesForTab);

Answer 1

Firefox console has been divided into different areas. The result of console.log() can be viewed in the relative area.
Multiprocess Browser Console Ctrl+Shift+J
Mostly logs by Firefox itself
Web Developer Tools Ctrl+Shift+I or F12
Logs by Tab/Webpage and Content scripts of addons
Extension Toolbox about:debugging#/runtime/this-firefox ➜ XYZaddon ➜ Inspect
Logs by background scripts of XYZaddon
Update
Based on comments, here is a tested simplified code that you can work on. The log shows on Extension Toolbox.
async function showCookiesForTab() {
// get the first tab object in the array
const tabs = await browser.tabs.query({currentWindow: true, active: true});
// get all cookies in the domain
const cookies = await browser.cookies.getAll({url: tabs[0].url});
console.log(cookies);
// Array(6) [ {…}, {…}, {…}, {…}, {…}, {…} ]
}
showCookiesForTab();

Answer 2

I had a similar issue. I didn’t figure out the cause, but I find a way to see the console.log in the Extension Toolbox.
I added a background script to handle most of the popup.js logic.
And since there is a background script running, I can see the log.
Still don’t why I couldn’t see the log in the first place.