Yes. However, if you use custom firmware (CFW), do not install this until your CFW developer releases an update.
Here’s a short, clear piece you can use for a blog post, status update, or news brief about . Title: PS3 Firmware Update 4.90 – What You Need to Know ps3 update 4.90 download
If you rarely turn on your PS3, the update may appear mandatory for signing into PSN or playing newer game discs. if you use custom firmware (CFW)
Sony has released , even years after the PlayStation 3 was officially discontinued. This is a mandatory stability update. ps3 update 4.90 download