Recently I noticed that when I tried to right click on something and use the pop up menu some odd things were happening.
1 - The menu would not appear until I moved the mouse cursor into the area where the menu should appear.
2 - Once the menu did appear, some menu items did not show the hover selector as the mouse was moved over them
3 - If I held the Right mouse button and moved the mouse, a coloured line (green) was drawn a couple of inches away from the position of the cursor.
But it did not happen all the time. There seemed to be a random element to it.
I tried a few Google searches using different combinations of words, but got all sorts of other things that were nothing to do with the problem. Then I realised it was only happening in my Slimjet and some other Chrome based browsers but not in Firefox or Cyberfox.
I looked at the settings in my computers and found that on one of them I had a setting configured in two browsers that was not configured in the other computer.
In my Slimjet browser I opened Settings then scrolled almost to the bottom and found System.
There are two 'Checkbox' items there. The second one is 'Use hardware acceleration when available'.
It was not checked on the computer that was behaving well, but it was checked on the problem computer.
I unchecked it, restarted the browser and everything is now perfect.
I have no idea how or why I had enabled hardware acceleration in a browser - but I am writing it here so when I do something that dumb again I will find it easily using Google :-)
Chromium was fixed more or less the same way and I suppose this should work for most Chrome based browsers.
It is nice to have a fully working context menu again with no lag. It is possible turning on Hardware Acceleration on some graphics card setting could cause a similar problem, but this fixed the browser menu problem and the whole browser is responding better.