• I am on the latest ActivityWatch version.
• I have searched the issues of this repo and believe that this is not a duplicate.

• OS name and version: Ubuntu 22.04
• ActivityWatch version: 0.13 (deb Installation)

Describe the bug

Since the new version (updated from 0.12.2 to 0.13) the WebUI does not work in Firefox anymore. There is an error

TypeError: e.slice().map is not a function. See dev console (F12) and/or server logs for more info.

Opening the WebUI and everything is fine.

To Reproduce

• Update to the currently newest version 0.13
• starting ActivityWatch via qt (e.g. /opt/activitywatch/aw-qt)
• opening ActivityWatch in firefox (http://localhost:5600/#/activity/HOSTNAME/view/)

Updating

While updating I found that you provide a deb package. I used the generic Linux zip file and started the binary from their.

I installed the deb file and started the application new from the /opt/activitywatch/aw-qt instead of $HOME/.local/bin/activitywatch/aw-qt

Expected behavior

• Do not show the error, show the Activity screen

Documentation

I added some screenshots above, I hope this is fine.

Additional context

Maybe another bug or mistake I made, but I enable since the update and/or enable the rust server my categorization is gone. I don't think this i related to the firefox bug.