From the info on the original Chrome extension - https://chrome.google.com/webstore/detail/auto-text-expander-for-go/iibninhmiggehlcdolcilmhacighjamp?hl=en

** KNOWN COMPATIBLE WEB APPS **
- Basecamp
- Confluence (Atlassian)
- Evernote
- Facebook Chat
- Gmail / Google Inbox
- Google Translate
- LinkedIn
- MailChimp
- Outlook
- Salesforce
- Slack

I would recommend that you contact the original creator on the Chrome store and send this feedback. Thanks