javascript enable on firefox from Google chrome

I need help please ... I updated firefox which is complicated for me I'm not tech savvy. I need javascript on firefox I dis enabled from Google chrome- firefox is my default . I keep getting messages from Google while trying to update reads my data Info not safe cancel or continue ...for hours I'm reading & reading back & forth trying to figure out best options to enable javascript which I need for my new blog .. while making the changes Google keeps giving message not safe... Please advise and help get javascript enabled How to get updated firefox ( I thought I already updated) but Google keeps being involved?? What should I delete on my Samsung Androud tablet - I'm confused?? I apologize not understanding completely... I have been hacked many times so I know I need firefox protected privacy ... Google doesn't seem to have privacy Please share what all I need to add with firefox for best browser and all over service need to download ? & javascript enabled and how to stay protected while making change over Please ..

Thank you , Elaine