Firefox or Google Chrome, it doesn't matter if the end user doesn't follow safe computing practices.
Before anything, give this to your sister and make sure she read it: How to keep your computer safe online
I use Google Chrome, as it has a x64 native build and thus takes less resources (Firefox's x64 build is still in development).
And here are some suggestions you may find useful to enhance your browser's security:
- Always keep a resident AV running, and get additional AM protection via Malwarebytes Anti-Malware
or Emsisoft Anti-Malware
. Be noted that both do not offer real time protection in their free version
, and thus you must manually do scans.
- Remove Java, Flash and Silverlight if you do not use them.
- Adblock Plus for Firefox
: This will keep ads out of your surfing, and also reduces the chance that attackers will use malicious ads to infect your machine.
If she decides to use Chrome, get her uBlock
instead as it is less resource intensive.
- NoScript for Firefox
: This will allow you to block malicious scripts while allowing legit ones. It can take a while to learn which ones to allow or block, but once you got the hang of it then it becomes a very effective tool.
Chrome has a similar tool called ScriptSafe
- Web of Trust
: Gives you a general idea of what is good and bad via community feedback. Take it with a grain of salt however, as it is not always accurate. The addon is available to both browsers.
- Malwarebytes Anti-Exploit
: This is a small app that prevents malware from using exploits - loopholes in apps that they can use - to infiltrate your machine. Just install the app and forget it, it'll do its job automatically.
: This is an app that prevents the execution of crypto ransomware by placing software restrictions into places they are known to start from.
: This is an offshoot of the AM scanner HitmanPro that monitors browsers and warns you if they are compromised by banking trojans. It also features the ability to neutralize active crypto ransomware and gives you the option to kill it with HitmanPro, and exploit mitigration similar to MBAE.
- Secunia Personal Software Inspector
: This utility helps you in keeping your programs up-to-date by inspecting your machine for any outdated software.
If you have any questions, feel free to ask.