Many websites have search facilities and IMDB for example, lets you search for movies, TV shows and actors, Reddit lets you search the thousands of discussion threads for interesting chat. Wherever there is a search box on a web page, you can create a custom search facility in Firefox. Here is how to do it.
Right click in the search box on a web page in Firefox and select Add a Keyword for this search. In the screen shot below, the search box on Reddit’s home page has been right clicked.
The search must have a name and one is suggested from the page title. It can be left as it is or changed to whatever you want. The important thing is to enter a keyword for this search that is easy to remember. For example, you might want to use red for Reddit searches.
Notice that Folder is set to Bookmarks Menu. This search trick actually creates a bookmark in Firefox, so if you want to edit it, delete it or rename it at some point in the future, you can go to Firefox’s Bookmarks Manager by pressing Ctrl+Shift+B and find it.
After saving this, you can now search this website no matter where you are on the internet by entering the keyword followed by the search term in the address box. For example, to search Reddit for Superbowl discussions, no matter which website we are on, we can enter ‘red superbowl’ like this.
The results are displayed exactly as if you had used the search facility on the website.
The only limitation with these custom searches is your memory. If you create a couple of dozen you probably will not be able to remember all the keywords, so don't over use them. Use keywords that help you to remember which website you are searching, such as red for Reddit and it will help you to remember them.