Furious Los Angeles firefighters have dumped hundreds of thousands of signatures on City Hall, demanding it raises sales taxes to cover chronic shortages across the Los Angeles Fire Department. LAFD bosses have warned for months they are desperately overstretched with a massive cash shortfall, and some staff are even going unpaid while pulling mammoth 48-hour shifts fighting the flames. But in her budget last month, Mayor Karen Bass refused to raise their funding , despite a deadly wildfire wiping out large swathes of the city last year. Firefighters have dumped hundreds of thousands of signatures on City Hall demanding it raises tax to cover shortages. Pedro Colo for CA Post Fire bosses have warned the cash shortfall means some firefighters are going unpaid while pulling 48-hour shifts.…