If you are interested in watching movies online for free then you may do so through certain websites that may feature them. However it would be important for you to compare different websites that appear to have free movies that meet your criteria for you to watch before you can settle for them and keep using them for all of your future movie watching needs. It is quite important for you to know what categories of movies you would want to watch so you can choose them accordingly.
However, what is more important for you to bear in mind would be the fact that the website that you go for to watch your movies from, is safe in terms of not making you install anything, be it an application to simplify the process of watching movies for you or a malware for example given that you would simply want to be able to watch using your existing browser and any device at any time without being restricted in any way, shape or form.
Luckily, there are several such websites that you could benefit from and an example of such a website is gomovies which would make things a lot easier for you to follow. You may want to check it out yourself before you decide how best you could be using it.