--- a/browser/browser/aboutPrivateBrowsing.ftl
+++ b/browser/browser/aboutPrivateBrowsing.ftl
@@ -31,16 +31,18 @@ about-private-browsing-get-privacy = 获得全场景隐私保护
 about-private-browsing-hide-activity-1 = { -mozilla-vpn-brand-name } 可隐藏您的浏览活动和位置。即使在公共 Wi-Fi 下，也可一键建立安全连接。
 about-private-browsing-prominent-cta = { -mozilla-vpn-brand-name } 可提供隐私保护
 about-private-browsing-focus-promo-cta = 下载 { -focus-brand-name }
 about-private-browsing-focus-promo-header = { -focus-brand-name }：随手可得的隐私浏览
 about-private-browsing-focus-promo-text = 我们隐私浏览专用 App，可自动清除您每次上网的浏览记录和 Cookie。
 
 ## The following strings will be used for experiments in Fx99 and Fx100
 
+about-private-browsing-focus-promo-header-b = 手机上亦可私密浏览
+about-private-browsing-focus-promo-text-b = 在 { -focus-brand-name } 上隐私搜索不愿被主浏览器记录的内容。
 about-private-browsing-focus-promo-header-c = 移动端更强大的隐私保护
 about-private-browsing-focus-promo-text-c = { -focus-brand-name } 不仅会自动清除浏览记录，且能够拦截广告和跟踪器。
 # This string is the title for the banner for search engine selection
 # in a private window.
 # Variables:
 #   $engineName (String) - The engine name that will currently be used for the private window.
 about-private-browsing-search-banner-title = { $engineName } 是您在隐私窗口中的默认搜索引擎
 about-private-browsing-search-banner-description =