Sometime in 2012, Adobe Flash asked me to update it. I tried, but it didn't work because my browsers (firefox and chrome) didn't support the newest flash. I tried to update my browsers, but neither firefox nor chrome supports mac os 10.5.8 anymore. Safari keeps telling me to update flash too. I know that using an older version of flash can be a security hazard, so I really want to update.
My question: Is there any browser I can use safely now?
Is there perhaps a variant of firefox that has been kept up to date for mac 10.5?