The next big update of the Windows 10, codenamed 19H1 and expected to be released sometime in April 2019, will allow you to uninstall more of Windows 10's built-in apps. 
You do not want 3D Viewer, Groove Music or Paint 3D, why are not you using them? No problem you can remove them.
This feature has just been added to build 18262 της προεπισκόπησης των Windows Insiders, και είναι διαθέσιμη από σήμερα στο fast ring. Για να απεγκαταστήσετε μία από τις εφαρμογές που αναφέρονται παρακάτω, θα μπορείτε να το κάνετε με ένα δεξί κλικ στη συντόμευση της εφαρμογής στο μενού Έναρξης επιλέγοντας "Κατάργηση εγκατάστασης".
Below is a complete list of apps you can remove:
- 3D Viewer (formerly called Mixed Reality Viewer)
- Calculator
- Calendar
- Groove Music
- Movies & TV
- Paint 3D
- Snip & Sketch
- Sticky Notes
- Voice Recorder
You can already uninstall some of the Microsoft applications in the same way. Here are the applications that you can quickly uninstall from now on if you are using the October 2018 Update or an older version of Windows 10:
- Microsoft Solitaire Collection
- My Office
- OneNote
- Print 3D
- Skype or Whatsapp
- Type
- Weather
If you remove an embedded application, you can reinstall it from the Store if you need it.
Τα Windows 10 σας επιτρέπουν να απεγκαταστήσετε τις εφαρμογές που "εγκαθιστούν αυτόματα" στον υπολογιστή σας. Μπορείτε να απεγκαταστήσετε εφαρμογές όπως το Bubble Witch 3 Saga, το Candy Crush Soda Saga και το FarmVille 2: Country Escape αυτή τη στιγμή κάνοντας δεξί κλικ πάνω τους και επιλέγοντας "Uninstall".
With the next update of Windows 10, Microsoft can provide more options for removing applications, but some such as Camera, Microsoft Edge, and Store will still be key parts of Windows 10 and will not be removed.
Of course, if you do not want to wait, you can uninstall almost all embedded Windows 10 applications by running some commands on PowerShell.
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Edge can not be removed as any operation - search in third party browsers is also registered in the Edge.
I am wrong ;
I'm sorry for Giorgos but I did not understand what you mean. If you are talking about firefox searches, not Edge has access to firefox cookies. In general, each browser only has access to its own cookies and its own history.