The ordinary browser of yesteryears… It was just a way to merely visit web pages and open html files.
Your wife asked you to enhance the background of a pic stored in her computer before she can post on Facebook? No problem. Use PIXLR or any other inexpensive online image manipulation tool and claim to be the guy with the expensive Photoshop software.
Web developers are also catching up with the trend of in-browser development using web services, web APIs and standard data protocols. As more and more applications are moving to the cloud with no custom software footprint on local computers, I see more and more usage of browser for coding, configuration, deployment, collaboration and troubleshooting.
I have compiled a list of some commonly used tools available over the browser and applicable for Office 365 development. You don’t need to install anything for these (but of course the browser :-))
NAPA is browser base Code Editor which allow basic level intelligence, Code Coloring, Deployment only on Office 365. It is an app which can be added to SharePoint sites. Also you can open same Project in Visual studio. Its Like an IDE but browser based, however it is not suitable for large size application development.
Browser development tool bar
Chrome Development Tools: https://developers.google.com/web/tools/chrome-devtools/
IE developer toolbar: https://docs.microsoft.com/en-us/microsoft-edge/f12-devtools-guide
Firefox Firebug: https://developer.mozilla.org/en-US/docs/Tools
Moreover, review your Apps list (append “/_layouts/15/ta_allapplicensesmanagement.aspx” to SharePoint Admin site) to see what’s available. Utilize those apps to configure over the browser as per requirement. Remember they can’t snatch your rights to code even if you have no (Admin) rights to install software.