1411554 - when new tab is created browser.tabs.onCreated.addListener return about:blank sometime instead of about:newtab

Status: RESOLVED WORKSFORME

(WebExtensions :: Frontend, defect)

Description

[Richard]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.62 Safari/537.36

Steps to reproduce:

browser.tabs.onCreated.addListener(handleCreated);
function handleCreated(tab) { console.log(tab.url); }

in background script;


Actual results:

When I first open Firefox and click on a new tab I get about:blank - most of the time.  If i recheck the tab 100 ms later I get about:newtab  There seems to be a race problem.


Expected results:

I should have got about:newtab

Comment 1

[Kris Maglione [:kmag]]

This is the expected behavior. The final URL of a tab is not always known when it's first created. You need to listen for an onUpdated event if you want to know what actually winds up loaded into the tab.

Comment 2

[Andy McKay]

This sounds like its by design based on comment 1.