I have coordinated with @SodiumEnglish to add "Permanent Links" to the Plugin Index.
Below the search filters, there is now a button that creates a link based on your set parameters.
The button will create links like this:
https://forums.getpaint.net/PluginIndex?keywords=Grid&author=All+Authors+&type=1&status=7&compat=3&order=title&menu=All+Menus+&release=0
If you only care about certain search parameters, you can omit the other parameters from the URL. If you do omit a parameter, the default value of that parameter will be used.
So, you have sorter links like these:
https://forums.getpaint.net/PluginIndex?author=toe_head2001
https://forums.getpaint.net/PluginIndex?keywords=Grid