It will perhaps feel a bit weird at first if you're used to go to the address-bar with the mouse but really, since you are going to type an address you are still going to use the keyboard anyway.
Chrome on Linux is the only browser that breaks this. Instead of me having to change how I browse in every browser, why doesn't Google simply add the option to change like Firefox does?
There is a balance of having everything customizable and forcing the users to adapt. In this case both Mozilla and Google have made the same call, they feel that this is how it is supposed to be on Linux - I don't think we can blame them for that.
Firefox has always been about customizability while chrome has always been about simplicity, you just don't have that level of detail of customizability in Chrome - for good or worse, that's why. If anything I'd be surprised if they did present this as an option (for every option they do get wrong that sucks but they have been doing a remarkably good job overall (in my opinion), but I'm with you on this one).
Also, as the OP is using a mouse action, it's worth pointing out that triple-clicking the URL does a select-all (by analogy to selecting the whole "line" in other apps).
Internet Explorer.
If I remember correctly, Phoenix (firefox) was the first browser to support that keybinding. The lack of support for this shortcut in Netscape/Mozilla was one of the reasons I struggled to switch away from IE back in the day. Really hated Ctrl+L as it required two hands (OK, you need two hands to type out the URL, but I was used to Alt+D dammit! :)