revisit enforce `ask` for downloads | also patch `ask` for other files

ESR115 built from 33fdfcfc

/* 2651: enable user interaction for security by always asking where to download
 * [SETUP-CHROME] On Android this blocks longtapping and saving images
 * [SETTING] General>Downloads>Always ask you where to save files ***/
user_pref("browser.download.useDownloadDir", false);

this is default false on previous ESRs, so we've regressed something somewhere? @pierov

also, while we're at it

/* 2654: enable user interaction for security by always asking how to handle new mimetypes [FF101+]
 * [SETTING] General>Files and Applications>What should Firefox do with other files ***/
user_pref("browser.download.always_ask_before_handling_new_types", true);

this is default false in earlier releases and I think I opened an issue about this, might as well cover it here