1522184 - A new tab that is loaded, discarded, selected, updated to a different url, and then discarded will return the initial url when queried.

Status: RESOLVED DUPLICATE of bug 1498432

(Firefox :: Session Restore, defect, P3)

Description

[anon]

User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

1. Install a discard/unload extension like 'Tab Unloader'.

2. Install an extension with tabs permission like 'Ublock Origin'.

3. In about:debugging, open the debug console under the extension with tabs permissions (like 'Ublock Origin').

4. Close every tab, except about:debugging.

5. Create a new tab and navigate to "https://www.google.com".

6. Deselect tab and discard/unload it.

7. Reselect tab and wait for it to load and then navigate to "https://www.mozilla.com".

8. Deselect tab after it has loaded and then discard/unload it.

9. In the console, execute the following:

   browser.tabs.query({}).then(tabs => {
   for (let t of tabs) {
   console.log("tab " + t.id + " - " + "title: " + t.title);
   console.log("tab " + t.id + " - " + "url: " + t.url);
   }
   });

Actual results:

The url of the tab that had been discarded multiple times will show "https://google.com", instead of "https://www.mozilla.com".

Comment 1

[anon]

This bug also happens if a new discarded tab is created. If a user selects it to load, navigates to a new url, then discards it, the first url will be returned when queried.

This bug is very close to another I reported:

https://bugzilla.mozilla.org/show_bug.cgi?id=1498432

It may even be a duplicate.

Comment 2

[Robert AB]

Similar situation is here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1624083

The only difference is the way the tab was made not active (by browser restart in Bug 1624083, or by discard extension in this bug - Bug 1522184).