Like a privacy based fully open source browser. Wouldnt it be more hackable because every one know the script and is a glopal privacy based gpay alternative possible ? What about targeted hacking is someone using closed source application more better off than someone with ooen source ?
This is where most of the problems in open source come from. Just because anyone can look at the source code doesn’t mean that anyone actually is. It frequently seems that everyone just assumes that popular/common libraries have been reviewed and vetted, but never bother to check for themselves unless they happen to work in application security. It’s like Douglas Adams’ SEP field. And many common modules became common because they were convenient and/or easy to use, not because they were rigorously developed and tested with strong security principles.
Of course expecting every user to inspect the source of every piece of software they use, every time it gets an update, is utterly ridiculous. No one would ever actually use anything.
With closed source, the problem is that you can’t see the code so you need to be sure that you trust the developer. With open source, the problem is spaghetti code (and worse, spaghetti dependencies) so again you need to be sure that you trust the developer(s).