weekly a popup msg appears about an update having started and asking me to close firefox instead of opening a new tab.

a,most weekly when I try to open a new tab I'm told an update started in the background and I need to restart firefox to continue working. I can't open any new tabs or go to a new website unless I restart. Is there a way to run updates on MY Schedule rather than having this happen. a notice that an update is ready to be installed rather than per-emotively just starting one would be polite and appreciated.. Just 'starting' it in the background without telling me makes you guys look like Microsoft rather than Mozilla.