Is there an Alexa app for a chromebook? I already have a fire stick in my tv,but would like to use Alexa on my Chromebook too.

Android steps:

1. Select "Settings" on your phone's operating system (not in the Alexa app)
2. Tap "Accessibility"
3. Tap "Font size" and use the slider to choose font size.
4. The text size will automatically save and be seen in the Alexa app.

How to use Text Scaling in the Alexa app - Amazon.com

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How to Control your Fire TV Stick with Amazon Echo Dot ...

If your camera isn't working, or if you see a message that says "No camera found": Turn off your Chromebook, then turn it back on. Try using the camera in another app, like Hangouts. If it works in that app, uninstall the app where it doesn't work, then reinstall it.

Fix hardware and system problems - Chromebook Help

this link might show you how.. how to delete the app program google from my acer chromebook 11 Google...

Use Chromecast with your Chromebook
You can view your favorite videos, photos, and websites on your TV using Chromecast.
Before you set up
For Chromecast to work on your Chromebook, you'll need:

• Chromecast or Android TV
• The newest version of Chrome OS. Learn how to update your Chromebook software.
• A TV with HDMI input

Set up Chromecast with your Chromebook

1. Turn on your TV.
2. Plug in your Chromecast. Learn how to plug your Chromecast in to your TV.
3. Using the Input or Source button on your TV remote, change the input on your TV until you see the Chromecast home screen.
4. On your Chromebook, sign in to your account.
5. Follow the steps that show on your TV. Learn how to set up Chromecast.

Chromebook does NOT run windows.
Any program designed for Windows will likely NOT run on Chrome.
The answer was given to you.
Look in the Chrome Web Store to see if that app or a similar one is available. If not, then look again later.

The whole point of a Chromebook is that you don't have apps - you use the cloud! All the apps you require are part of Google Drive - just log in and they'll be available to you.

check here this explain well your problem
https://support.google.com/chromebook/answer/1700055?hl=en

There is no solve of this problem.