You can narrow your searches by starting them with:
|+||Tags, separate with spaces for multiple|
They're easy to forget, but there's a little add-on you can use to remind yourself: location-bar-characters.
Reader View is a nice clean way to read stuff online. Makes a lot of news and writing sites actually tolerable. Strips out everything but the text and images. Especially great on mobile, as it will turn pages that aren't designed for a small screen into something comfortable to read in that format.
Some add-ons for enhancing reader view (that I'm yet to test ):
To add a custom RSS feed reader, so that when you click o nthe 'subscribe' button you can subscribe with your choice of reader, you:
right-click > New > String
browser.contentHandlers.types.[number].title, then add the title of your reader.
browser.contentHandlers.types.[number].type, then add
browser.contentHandlers.types.[number].uri, then add the URL for your readers 'add feed' function placing a
%swhere the feed's URL should go. This last part's the trickiest to describe, 'cause it's gunna differ for each reader. But I'll add examples below