Hi
sonicReducer,
I believe K9 will by default enable the strict-filtering mode in Google Search even when you are navigating in Incognito mode. However, the uninstalling and reinstalling may have changed some settings somewhere. If you still have access to the control panel, please look in there, as I am sure there is a box that needs to be checked.
If K9 was updated and does not have that option anymore, I would venture to say that this is not really a big deal. Why? Because so long as you have emunah in Hashem and are truly willing to get off this addiction, you would not choose to navigate in Incognito mode.
I remember Rabbi Mizrachi telling the story of a jew that needed to get somewhere in the city. He had two options: Take the shortest route which goes on the main street or take a detour on a quiet street, yet a much longer route. The jew knew that there would be goyim all over the street including immodest women; therefore, looking at them would be a great sin. But he promised Hashem that he would force himself to look at the ground the whole time so as to not awaken his yetzer hara. In the end, the jew took the shortest route thereby walking on the main street. B"H, he was able to walk the whole street without lifting his eyes. He had made it. He thought he was a tzadik. But was he?
The moral of the story is not that the jew was a tzadik because, B"H, he was able to make it to the other end of the city without looking at immodest things. If fact he was
not tzadik at all. Quite the contrary! Why? Because he took a chance! He could have put himself in a dangerous situation! What would have happened to this jew, if an immodest lady would have asked for directions; if the person walking in front of him would have had a heart attack, etc. etc.—the scenarios are endless. Surely, he would not have been able to keep his eyes locked to the ground. Anyhow, in the end, he was
not a tzadik because he took a gamble...
The same would be apply here. If you have emunah—B"H it does not matter if Google Image does not filter in Incognito mode. That would be like taking the main street whilst you know that you have other alternatives.