Problem solved (sort of). I was able to get in touch with a live person, who told me that the G9x was only sold until 2017, and that the software is no longer being provided for it; therefore no more updates. So, my efforts are moot. On the other hand, I was able to get Chrome downloaded and running independently from Safari, but since there is no Cardo update available anyway, all my efforts have been in vain.
Thanks to those who sent messages of assistant.