Added thumb hide for chrome and firefox

[vegetableman]

Fixes #7

[vegetableman]

hey @rappo, hope you are not too busy, Could you review this PR?

[vegetableman]

Could this be merged?

[rappo]

@vegetableman sorry for the delay! We'll be making a few tweaks ourselves, but this looks good! I'll close the issue so you can be awarded the bounty.

[vegetableman]

Have submitted the claim. Let me know if you need any help with the tweaks. I would be happy to update this PR.

[CLAassistant]

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