looks like its just setting some events, these two lines should clear the anti-select and the anti-right click respectively if pasted into the debug console:
Firefox has an add-on called "Allow Right-Click" that lets you easily toggle blocking right-click scripts. Some sites offer a useful context menu, like Google Drive, so you don't necessarily want to always be blocking them. Hence the toggle.
you reminded me of a site that was "down for maintenance" (they were just spamming an alert) after using the block multiple alerts button in firefox, it works fine
there are both categories.
Some things are marginally better and incredibly expensive.
Other things, such as garden hose power snakes and these "audiophile crystals" are just pure scam.
I'd be all up for some diminishing returns but the price premium is nowhere close to adequate. For the price of an overbuilt headphone amp you can buy a soldering iron and parts for three amps that are four times as overbuilt. And include a metrology-grade DAC in all of them.
There are extensions that will download any media you want as long as it is in the source. There's a double left click to save an image one that is very useful.
