The printer runs normal on some site's but very slow on other

Nice to meet you, *****!
Could you please tell me the model of your printer?

Thank you!
*****, the printer is printing slowly from some websites, correct?

*****, please try the following instruction:

1. Reset the printer to recover from printer errors or failures.
2. If your printer has a rechargeable battery, remove it.
3. With the printer turned on, disconnect the power cord from the printer.
4. Unplug the power cord from the power source.
5. Wait 60 seconds.
6. Reconnect the power cord to a wall outlet and to the printer.
   NOTE: HP recommends plugging the printer directly into a wall outlet.
7. Turn on the printer to complete the reset.

Take your time!

It is possible that sometimes printer need to process more than we can see, and sometimes it can print slover like when you print pictures, please

Possible is
Do you have any additional questions I can help you with?

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