Firefox 106.0 releases on 18 October 2022, there are many new features, two of them is Firefox View and Tab Manager (same as Google Chrome), thankfully Mozilla is not Google, so we can easily remove this features.

Disable Firefox View

1. Right Click on Firefox View
2. Click Remove from Toolbar

Enable Firefox View

1. Right Click on Blank Space

2. Customize Toolbar

3. Firefox View will be there

4. Drag & Drop Firefox View to location want you to place

Disable Tab Manager

1. open about:config
2. Click on Accept the Risk and Continue Button
3. Search browser.tabs.tabmanager.enabled

4. Change value from True to False

Enable Tab Manager

1. open about:config
2. Click on Accept the Risk and Continue Button
3. Search browser.tabs.tabmanager.enabled
4. Change value from False to True

Restart Browser Without Losing Tabs

To restart browser without losing you’re tabs

1. Open about:profiles
2. Click on Restart normally...

This is after remove Firefox View and Tab Manager