Mattermost slowness investigation

Is there a way to add javascript to the of mattermost? We need to implement our APM/RUM into the application.


you can modify /opt/mattermost/client/root.html to your needs; this is what’s being served at the top of each page and also contains the HTML head, so you should be able to inject your custom javascript there.


Thanks. I was able to get the information that I was looking for regarding the slowness of Mattermost. I had to disable the Content-Security-Policy to get RUM to work. Here is my findings:

and if we dig further in rudderlabs: