Please capitalize where necessary: multiple addon deactivator is an add-on for firefox that adds options to quickly enable or disable multiple add-ons in the browser.
A: Multiple Addon Deactivator is an add-on for Firefox that adds options to quickly enable or disable multiple add-ons in the browser.

Please capitalize where necessary: we limit ourselves to a responsible, courteous and honest messenger service.
A: We limit ourselves to a responsible, courteous and honest messenger service.

Please capitalize where necessary: control of all the machine’s functions
A: Control of all the machine’s functions

Please capitalize where necessary: "that sentiment does you honor," said the wind; "but for this purpose wax lights will be necessary.
A:
"That sentiment does you honor," said the wind; "but for this purpose wax lights will be necessary.