Google has removed document editing from the mobile web version of Google Docs, opting instead for a banner encouraging users to download the official app from the Play Store. The move makes sense, since that’s how they’ve treated Sheets and Slides for a while now. But if you were hanging on and still editing your Google Docs in Chrome, looks like you’ll have to install the app now.
To be fair, the app offers way more functionality and just generally runs much better than the web view version. It might be bad news for someone dealing with a phone or tablet that has very limited storage space, but I’d imagine if they were heavy document editors, they’d probably be willing to upgrade to keep the functionality.