So do I, except I actually have such a button. Here’s a bookmarklet you can use to edit any page (until you navigate away from the page): Toggle Edit Page%20{%20document.designMode%20=%20%27on%27%20}%20else%20{%20document.designMode%20=%20%27off%27}%20void%200). Drag it to your bookmarks bar to use it.
So do I, except I actually have such a button. Here’s a bookmarklet you can use to edit any page (until you navigate away from the page): Toggle Edit Page%20{%20document.designMode%20=%20%27on%27%20}%20else%20{%20document.designMode%20=%20%27off%27}%20void%200). Drag it to your bookmarks bar to use it.