>>4277675
My browser is Firefox so the method I'm using is specific to firefox. I'm on Firefox 64.0 and please note that the people who maintain Firefox keep changing the screenshot technique so you may have to look up how to do it with your Firefox browser. If you are using some other browser I can't help you.
Firefox.
Navigate to the page you want to screenshot.
Press SHIFT-CTRL-K to open the developer tools panel.
On the command line of the developer tools panel, type this (exactly):
:screenshot –fullpage
The browser grabs a screenshot, makes a "click" like a camera, and saves it in the Downloads directory. The save directory is not configurable.
Often, these PNG files are extremely large: 4 to 10 MB.
If the file is too large, I drag it into my graphics editor (I use gimp) and possibly crop it and export as a JPEG with a lot of compression. 65% quality setting is aggressive compression and will often shrink a 4 MB file to about 600 kb.
I have an ad blocker installed on my Firefox so when I screenshot you don't see a lot of ads.
Good luck.