But in the nightly build, you get to choose the default browser for Windows also. Put a check on the option Use this search engine for searched from Windows. You can also set Yahoo or Duck Duck Go as your default search engine.
Black candles is used for Discord, protection from retribution, power, strengh, banishing rituals and protection. Blue - Peace and Harmony, protection, healing, curing fevers, re-uniting friendships, house blessings, breaking bad habits, overcoming addiction, clearing atmosphere where there are arguments or trauma.
You can probably avoid black marks on the wall by burning (good-quality) candles on a coffee table, FAAAAR away from the walls. You might also consider an alternate light source, such as a salt lamp (which use either small lightbulbs or small candles) which would still be soothing but perhaps not so problematic.