A usability extension, which lets you to copy multiple texts and shows them in right click menu. Paste any of the text in any input field.

To Copy: Right click on selected text -> Multicopy -> Copy this!
To Paste: Right click on text area -> Multicopy -> Select the entry

Firefox - https://addons.mozilla.org/en-US/firefox/addon/multi-copy

Chrome - https://chrome.google.com/webstore/detail/multicopy/bbihhbmcpmmbidebeomhomjelncfghcl