# Kee fills the Browser console with messages about undefined p.sender.tab

**URL:** <https://forum.kee.pm/t/kee-fills-the-browser-console-with-messages-about-undefined-p-sender-tab/3016>\
**Category:** Kee browser extension\
**Tags:** debug\
**Created:** [July 8, 2020, 5:27pm UTC](https://forum.kee.pm/t/kee-fills-the-browser-console-with-messages-about-undefined-p-sender-tab/3016 "2020-07-08T17:27:22Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![mnaiman](https://forum.kee.pm/user_avatar/forum.kee.pm/mnaiman/32/999_2.png) [@mnaiman](https://forum.kee.pm/u/mnaiman)\
**Post date:** [July 13, 2020, 5:28pm UTC](https://forum.kee.pm/t/kee-fills-the-browser-console-with-messages-about-undefined-p-sender-tab/3016/4 "2020-07-13T17:28:12Z")

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This could be why there is tab undefined in last post of [Constant CPU usage, increasing memory usage, killing the browser](https://forum.kee.pm/t/constant-cpu-usage-increasing-memory-usage-killing-the-browser/966/23)

There is this code:  
browser.tabs.onUpdated.addListener((tabId, changeInfo, tabInfo) =\> {

```
function onFound(tabs) {
	**let tab = tabs[0];**
```

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