Why doesn't Facebook allow users to change its theme? [closed]

1. Can you change theme on Facebook?
2. Why does Facebook keep changing to dark mode?
3. How do I get the new Facebook theme?

Can you change theme on Facebook?

From Chats, open the conversation you want to pick a color for. In the top, tap the conversation name. Tap Theme. Tap on a theme, color or gradient for the conversation.

Why does Facebook keep changing to dark mode?

B Remove web browser cookies to solve the issue that keeps changing from regular to dark mode by itself. Try to remove your cookies and cache files in your web browser. It is possible that you are an experiment user from Facebook that forced you to test the new Dark Mode theme.

How do I get the new Facebook theme?

Navigate to Facebook.com and click on the S button. Click on "Find Styles for this Site" to open a new tab with free themes to use for Facebook. Click on any theme and a preview will be shown. If everything is fine in the previewed theme, click on "Install with Stylish" button at the top right corner of the page.