@Inner -
We've all had those kind of days, I am sure. But to add to this, and to also help you out, you can use the Media CSS command to define screen size based css.

For example:

@media only screen and (max-width: 767px) {
    .ossn-profile .user-fullname {
        max-width: 767px;
    }

In the example, when the screen size is <= to 767 pixels wide, the modified class gets applied to the CSS being used. This allows you to make required adjustments so that it's not a one-size fits all deal. And, you should either put your custom css into the theme's css or into a component's css.
Like, if you are using a custom theme, or have a component that you are making for personal use... put it in there. From my own experience you do not want to modify core files, and the Custom CSS/JS component applies the CSS unilaterally, which isn't always good.

Ok found the solution that I am happy with... So I altered the CSS by adding the custom CSS in the backend. Unfortunately, it modified both the web and mobile. So I found a happy medium. Anyway, the php files didn't really do anything as there was CSS attached... hopefully, this assist someone else in the future. Thanks for all your assistance.

.profile-photo-name-container {
text-align: left;
padding-left: 10px;
}

.ossn-profile .profile-photo {
margin-left: 20px;
width: 99%;
height: 20%;
margin: -50px auto auto;
position: relative;
border-radius: 75%;
}

.ossn-profile .profile-photo img {
height: 100px;
width: 100px;
border-radius: 50%;
border: 2px solid #fff;
}

Ok, so I can see it change on the web, but when on the mobile, it does not change. Is there a different file for the mobile vs the page component php file? hmm.

FML..... I just realized I only got a partial GET from the server..... So It was never finding the file... Thanks guys, my appologies. This had me going... Dang it

After seeing the results below I had to recheck, and low and behold not a complete GET..... wow I am an idiot...

anyway, thanks everyone.

Vielen Danke, Michael. Yes, I did that parameter search... but as stated I had a brain fart and completely missed the mark this time.

Also he mentioned that he is using Dreamweaver (in private email) seems the way he is searching is wrong, I did search and it worked. Anyway the file is correct mentioned by Michael below.

What string were you looking for exactly?

Assuming you've been through https://www.opensource-socialnetwork.org/wiki/view/1137/how-to-find-something-a-word-pattern-in-the-source-code

doing a right click->inspect on the user image gives

Thus, simply searching for the partwidth="170" would already return the line

<img src="<?php echo $user->iconURL()->larger; ?>" height="170" width="170"  />

along with the filename components/OssnProfile/plugins/default/profile/pages/profile.php

So again:
What string were you looking for exactly? And what kind of search did you do?

With all due respect Mr. Shah, your answer of doing a string search across all files was already performed using several methods, as I stated in the ticket. Unfortunately, it results in 0 findings. Hence the reason asking in the community as per your suggestion also.

Hopefully, someone here has performed this and knows the correct answer. As I am not finding this anywhere in the files.

Dear Inner, I have already answered your question in ticket and showed you how to find it in code using the tool you used.