What will be the limits of Selenium?

Following are the constraints of Selenium:

1. Selenium supports testing of only internet based applications
2. Cellular applications cannot be examined using Selenium
3. Captcha and bar-code readers are unable to be analyzed using Selenium
4. Reports can only be generated using third party resources like TestNG or Junit.
5. As Selenium is a totally free program, so there’s no ready seller support although the user can locate numerous helping communities.
6. User is anticipated to possess previous programming language information.