[BUG] Unbounded memory usage when scanning many URLs in a pipeline

[dkasak]

Describe the bug

When scanning many URLs in a pipeline, galer's memory usage will increase without bounds. This is likely because galer is starting a separate browser for each URL.

Instead, chromedp.Run should be run only once per run and then simply navigated to other URLs, as described in this comment/issue: chromedp/chromedp#454 (comment).

To Reproduce

galer <long_list_of_urls.txt

Expected behavior

Memory usage should not increase uncontrollably but should remain relatively constant.

Environment (please complete the following information):

• OS: Linux
• OS version: Linux REMOVED 6.0.2-zen1-1-zen [FEATURE] Set extra HTTP headers #1 ZEN SMP PREEMPT_DYNAMIC Sat, 15 Oct 2022 14:00:51 +0000 x86_64 GNU/Linux
• galer version: v0.0.2