Subnito

Have you ever been innocently browsing reddit and absentmindedly browsed your way into a NSFW subreddit? Wish the images and posts wouldn't show up in your history?

No longer! Subnito uses the reddit API to automatically detect if the subreddit you've just clicked on is SFW, and opens the link in incognito if not! Subnito also removes the url completely from your history.

Subreddit's use of the reddit API means it will always work for all subreddits, regardless of when it was created or how popular it is. So long as the sub has been properly tagged as 18+.

Note: Some subreddits consider themselves safe for <18's but not SFW (e.g. /r/sex for sex education and conversation). As far as I know there's no way to detect this automatically so these won't be opened in incognito.