Eclipse Community

I use my own userscript on all video web sites.
A brightness slider because the entire "color pallette" on some videos look like sh#tty shades of black for EVERYTHING.
And width/height sliders because I'd rather have a SLIGHTLY stretched video but use the entire viewing pane instead of stupid "black bars".
I can also fast-forward or rewind 15 seconds per click or slow playback to 85% if the action is too fast and I can't read CC fast enough, lol.

The userscript pops up my sliders only when I hover the mouse in the upper left corner.

My problem is that on some sites (technically, only Popcornflix so far), due to dynamic content, the userscript isn't "reloaded" / "reapplied" if I navigate back/forward to select a different video or if I refresh/reload the page.

Any suggestions?