Track number from .m3u?

Is it possible to get track number tag from a line number in m3u file? I've got it formatted like this:

Please use the upload function of this forum - otherwise the images may be lost if the remote server cancels its service.

You could load files referenced in the m3u file into MP3tag (which keeps the sequence) and then use the numbering wizard.
I do not see that you file has an actual number in each line.

imgur never deletes their images. Also, the files are just in correct order in .m3u file, not numbered.
How to load .m3u into MP3tag and where is the numbering wizard?

it is just a forum policy ...

Now it is time to have a look at the various menus, right?
The file menu has a function for playlists. Have you tried drag&drop?
Did you have a look at the functions in the toolbar. Read the bubblehelp to find the numbering wizard.

No, it's not.