Hi,

I spent some time on your suggestions and for possible workarounds if available

1. white icon - It is not difficult to have the user select a white background in the icon from settings. I have created a issue on my github repository to keep a track on this.
Link - https://github.com/ramkumar-kr/open-in-new-tab/issues/2

2. open in background - There are two ways for this -

a. "Bad" Workaround - Overriding a browser configuration in about:config - You can change the browser behavior to open all links which open in a new tab in the background by setting the
"browser.tabs.loadDivertedInBackground" config to true.
More info on - https://stackoverflow.com/q/7386208

b. Using the "tabs" API of webextensions - This would require an almost complete rewrite of the extension and can break a number of websites. I would like to use the tabs API but it will take a long time to iron out all the bugs and release it.

3. open at the end of tabs - This is also possible using the tabs API and as I said in 2(b), it will take a long time for me to have this feature.

Thanks,