How can I import .csv file with Tampermonkey extension?

I have a .csv file with 6 row and 8 column. The row can change anytime, so can be less or more.

All .csv cell including an information, but sometimes can be empty the cell value.

I would like to place 2 button. 1st for browse the .csv and the 2nd for start the process. Once I imported the .csv file I would like to autopopulate the field with .csv file cell content.

So instead of type all .csv value manually to the website, I would like automatically add this .csv file value to the input box field. Lets call this input box:

<input type="text" id="myText1" value="Some text from .csv A1 cell">
<input type="text" id="myText2" value="Some text from .csv B1 cell">
<input type="text" id="myText3" value="Some text from .csv C1 cell">
<input type="text" id="myText4" value="Some text from .csv D1 cell">
<input type="text" id="myText5" value="Some text from .csv E1 cell">
<input type="text" id="myText6" value="Some text from .csv F1 cell">
<input type="text" id="myText7" value="Some text from .csv G1 cell">
<input type="text" id="myText8" value="Some text from .csv H1 cell">