Auto Copy: Automatically copy selected text to the clipboard. Has options for copying as plain text; including the URL in the copied text; etc.

https://chrome.google.com/webstore/detail/auto-copy/bijpdibk...

Tab Snooze: Close unnecessary tabs and make them magically reappear when you need them.

https://chrome.google.com/webstore/detail/tab-snooze/pdiebia...