How do a flaten a list mixed with nested dict in ansible playbook?

I have a variable named packages as showed below, it is not a plain list, I have some nested dict in it like browsers.

I'd like to use instructions like below

to install all the pacakges defined in the variable, but I do not know what filter I should use the convert the variable to plain list, I need the items in the nested dictionary.

any help will be appreciated.

Answer

Please provide an example var definition that is valid yaml. Your current example cannot be parsed so no one can understand the exact data structure you want to use. Note that the problem also exists for your example task (but it is a little easier to guess).