Headless module's browser on custom sources doesn't get closed on each chapter download

[luevano]

Describe the bug

For each chapter download there is one browser that gets piled up and causes a lot of CPU and Memory usage overtime which leads to soft-lock of the system (stops responding and needs manual intervention).

Noticed this while downloading 180+ chapter mangas using the Mangasee custom source (which uses headless). I couldn't see any exposed close() (or similar) exposed function for the browser, as shown in the examples (not exactly the same, but I assume there is a way to manually close one).

Currently my solution is to let it download ~30 chapters then Ctrl + c out of the command (either TUI or inline), then run again.

Reproduction steps

1. Select any source that uses headless (Mangasee, for example).
2. Search for any manga with a lot of chapters (Solo Leveling, Overgeared, for example).
3. Start downloading all chapters.
4. Wait for a few minutes, then monitor the processes.
5. There will be a lot of chrome processes piled up, and on each new chapter downloading more will pile up.
6. Ctrl + c out of the download, all chrome processes gone.

Expected behavior

After each thread downloading a chapter, the headless browser should be closed.

Additional context

Just showing a couple of screenshots for reference, I don't know how else to show this behavior. Showing 3 pairs of screenshots for mangal output and chrome processes (through gotop), these are not taken at the exact same time, so there is a bit of discrepancy of amount of processes, but I think the effect can be shown.

Fresh start of a download:

Currently piled up chrome processes:

After a bit more chapters downloaded:

More chrome processes:

Cancelling the command:

All chrome processes gone:

Operating System

Linux

[luevano]

I fixed this at luevano/mangal-lua-libs@97fba97, I'm not doing PR anymore as these repos look inactive. And also need to include the browser:close() on the corresponding part of the code for the lua scrapers, also found at luevano/mangal-scrapers.