David Ojserkis trekked to his job at Williams-Sonoma in San Francisco on Monday sporting an accessory that’s in high demand: a respirator. He shared a selfie to Instagram, captioning the photo: “The new ‘normal’ for walking to work.” As firefighters make gains on the Butte County wildfire, people in the Bay Area continued early in the week to deal with poor air quality caused by smoke drifting in from the Paradise inferno.