Would it be possible to use other key than [Esc]?
It is a too common key to use in a system while displaying a webpage, and if by doing that (pressing the [Esc] key) it will activate the search and check of all links in the webpage in display, meaning, and by default, checking 16 links at once with a limit of 1000, which most of the time is an unnecessarily provocation of CPU, Memory and Network bandwidth usage...

In my case, to process this, a different input, preferable in with a combination, it would be much convenient, and also, if there were an option for the right clicks, so to bring up and display a menu where you could have it listed, so to click and not even use a keyboard input at all.

Ex.: a combination of [Ctrl}+[:], or [Ctrl}+[/]; as it may be more prone not to interfere with other plug-in/add-on with a possible same key(s) (usually a Letter) combination(s).

Right click anywhere inside page display area of the browser and get the option listed as "Highlight OCH links" or any other command option title name.

I notice that this "script" was published and shared on April of 2014 and last updated on June of the same year (2014).

Is this tools dead, not maintained anymore or etc...?

Is there a fix for the Issues that I am experiencing? (if you keep reading all)

If it is so, not maintained, then no need for further reading, as this issue will not be guaranteed to be resolved.

I tried different scenarios*, and by enabling this "user script", it end up being very annoying and damaging, same as an ineffective experience.

Here are the problems I am experiencing:

1- It does not show any "real" buffering, as the length indicator while being play or not on the video is not greyed (video buffer progress).

2 - Video on YouTube.com is not on play (but stopped or paused), and still, you can listen the audio as it were being play (while clearly, the video is in pause).

3 - It force a youtube and or flash downloader(s) plugin(s)/add-on(s)/extension(s) to be activated and run w/o your consent.

In several cases you can see the windows "task manager" with a large amount of "ffmpeg" instances running, such as around 10, 15, and etc, depending on the amount of "animations" that are in the content of a web page that you are visiting/displaying, as if there were activated to play or being converted. it does not happen with Microsoft "silverlight" media content.

4 - As per the force of media auto-activation, it end up crashing the browser (Firefox), the Windows "explorer" or to slowing down very much the system, due the high consumption of resources, as this "player/convertor" (ffmpeg) number of instance(s) process(es) cannot being stop or kill from use; and you have to restart the whole system as by Signing/login out then Signing/login in, it will not kill this process(es) neither.

*: I tried by isolating each and every browser "extension(s)/script(s)", leaving only this one and you notice the issue #2, when it is used in conjunction with a YouTube/flash media downloader, you notice the issue #3 and #4.

Thanks.