There are two methods to use the script, and both are active only while the browser location is a Metafilter site. First, you can use the browser menu pulldown Tools/Greasemonkey/User Script Commands.../Configure filters, as shown:
You may also use the context menu (right-click), to bring up a menu that will look similar to this:
Choose diediedead! and you will see a submenu:
If you select the last entry, Configure filters, the configuration dialog box will be displayed.
The configuration is, hopefully, reasonably self-explanatory. Place users whose posts you want filtered in the filter users text box, the text of posts you want filtered in the second text box, and posts containing sites you want filtered in the third box. Note that the user must be an exact match. Text filters are are not case sensitive and considered to be a whole word or set of words, e.g. cow will not match cows, but BIG COWS will match big cows. Sites match any part of a link.
The next grouping determines how filters work. If you want to temporarily turn off filters, choose the Show all content radio button. If filters should apply to both posts and comments to posts, choose Filter posts & comments. If you want your filters to apply only to posts, and not in comments to posts, choose posts only. For the reverse, choose comments only.
To streamline this process, the context menu can be used to quickly create filters and to choose filter actions. If you right click on a user in a post or comment, diediedead's context menu will have an entry Filter for user <username>. If you highlight text, and activate diediedead's context menu, the entry will show Filter for text <selected text>. Right clicking on a link will show Filter for site <base URL of site>. All filters will be added to the main configuration dialog box.
Context menus clicks are typically faster and more accurate than manual entry via the configure dialog. However, filters can only be edited or deleted via the configuration dialog box.
Because the entry fields on the configuration dialog box are HTML textareas, you can use the standard editing command Ctrl-Z to undo any changes to any of the three fields before saving. Ctrl-Shift-Z will redo any undo made before saving, as well.
User feedback on diediedead's context menu indicates it does not work properly with TamperMonkey and the Chrome browser, crippling its usability on that platform. This issue will be addressed by a native Chrome extension, available in the next 2-4 weeks.