Browser extensions, like any other piece of software, can have malicious code. While creating browser extensions, what can be done to make them more secure is to store all the complex codes on the server and not on the extension itself. This will prevent trespassing of the codes by hackers and ensure privacy.

Browsers shouldn’t be overloaded with browser extensions. It is recommended to use the same version of the javascript library used by the site for which these browser extensions are being built. It is also recommended to use vanilla Javascript where there is no requirement of loading complex libraries. Also, one can minimize using libraries that are already present on the page.

Different browsers have different extension systems. The main areas of comparison for Chrome, Firefox and Safari are based on Performance, Ease of Use, Security, Reliability, Privacy and Web Standards, and Compatibility. With a robust feature set and a thriving browser extension ecosystem, Google chrome is the gold standard for browsers. Firefox is also not far behind with a deep catalog of extensions and user interface customizations. There are also ample extensions available for safari, but their ecosystem is smaller than that of Chrome or Firefox.

No. Browser extensions extend your web browser with additional features, modify web pages, and integrate your browser with the other services you use. Apps, according to Google are "applications you can run inside your browser with a dedicated user interface and, typically, rich user interaction". Browser extensions are used to enhance the functionality of the Browser, while apps run within the browser with a different user interface.

When the development of your browser extension is complete, it’s time to publish it to the Store. Once the file is successfully uploaded, they provide a form for basic information collection that we complete and then publish the chrome extension to the store. Once done, it might take a little time to reflect in the store.