https://support.google.com/chrome/answer/99020?hl=enTurn off phishing & malware warnings
In some cases, you might want to turn off phishing and malware warnings to download a file from an obscure but trusted source. You can turn off these warnings, though we don't recommend it.. This also turns off download warnings.
Open Chrome.
In the top right, click the Chrome menu Chrome menu.
Click Settings > Show advanced settings.
Under "Privacy," uncheck the box "Protect you and your device from dangerous sites."
https://support.mozilla.org/en-US/questions/922449You can turn off the warnings at your own risk:
Firefox button > Options > Options (or Tools > Options) > Security, un-check both "Block reported attack sites" and "Block reported web forgeries"
-------------
PS: 最靠谱的解决思路是自己随身带一个超轻薄的本子