Firefox
If you are using Firefox to browse Twitter, you need to install an XPI file.
The latest version can be found here.
By clicking on the file, Firefox asks you, if you want to install an extension from github.com.
Agree by clicking Continue to installation and you will be asked, if Twitter-Tracking extension should be added and allowed to access data from twitter.com and some *.execute-api.eu-central-1.amazonaws.com website.
Agree by clicking Add and the extension will be installed.
To view the data collected during the current session, you can click on the small icon in the top right.
Updates to the extension should happen automatically by default. If you changed settings concerning automatic extension updates, please enable updates for Twitter-Tracking extension.