>>41330Get 4chanX is my recommendation. Go to your extensions in your browser and click on add extensions. Search for 4chanX. There are multiple so install the one with the green four leaf clover icon. This is an all encompassing extension that vastly improves your imageboard experience. After you have done that every single image will have clickable links that automatically reverse image search the photo for you.
The old fashioned way to do it is to download the picture, then go to google, click images in the top right corner, click on the camera icon, then upload the image you just downloaded. It's slower and less convenient than the 4chanX way but this is a work around if you don't feel comfortable downloading a program.
I think they might have added a way to do it natively in 4chan but I wouldn't know because I've been using 4chanX for so long that they've already been way ahead of native 4chan for features for years.