Loading ENS pages (.eth) overwrites DNS results and doesn't work on Firefox

[eduadiez]

The functionality introduced in v4.9.0 to resolve .eth domains doesn't check if the user's DNS is able to resolve a .eth or .test address. Therefore the extension prevents the user to access these sites even though the DNS is returning an IP address.

Also, the current implementation doesn't work in Firefox (tested on version 61.0.1) as it relies on a deprecated method: tabs.getSelected mozilla.org reference

• Expected Behavior

Don't overwrite domains that exist or if the DNS is able to resolve and work in both browsers in the same way

• Actual Behavior

It doesn't work in Firefox, it overwrites domains that end in .eth and .test

• Browser Used

Firefox & Chrome

• Operating System Used

MacOS High Sierra