Is an employee required to utilize the time saved—from four hours to ten minutes—by a program he created to reduce data entry duration, for other tasks, or is he permitted to use it for browsing the internet, given that in both scenarios he remains in the office for eight hours daily?

The benefits of a private employee are owned by the employer during the period of his work, because the Prophet, peace and blessings be upon him, said: "Muslims are bound by their conditions." The wage becomes due upon enabling the employer to benefit from you, whether work is available or not. Accordingly, the agreed-upon time must be fully dedicated to work. If you finish your work and still have free time, there is no objection to using it for things that do not harm the work, such as browsing permissible websites, provided that the employer permits it.