Microsoft does not allow the changes to remain in effect between sessions, The IDIOTS have a way to fix their damned piece of software that they infect machines with, but expect every site owner to rewrite their code to match the latest bugs put into IE11.
Time to change browsers.
And of course, “fixing” a web site to work properly under Internet Explorer often has the effect of breaking it for every other browser.
My biggest gripe about Microsoft is this:
In many areas (the coding of web pages being one) the industry as a whole has established certain standards. If a web site is written according to these standards, then it will render properly on any web browser that conforms to these standards.
The World Wide Web was intended to be standardized, browser independent, hardware independent, platform independent. The standards that underlie it were intended to assure that any properly-written web browser running under any operating system on any computer would be able to correctly render any properly-coded web page.
Microsoft arrogantly tries to force its own proprietary conventions in place of the universal standards. Their web browser often fails to properly render web sites that are written according to the standards. To guarantee that a web site renders properly under Internet Explorer, you have to follow Microsoft's “standards” for how it is to be coded, and if you do that, then there's a good chance that only Internet Explorer will be able to render it properly.
There's another important consideration as well. Consider Microsoft's Windows Update web site. By visiting this web site with Internet Explorer, you can download and install update to Windows. Think about what this means. The web browser, the same one that the most foolish of users might be using to surf all web sites of all levels of trustworthiness, has the authority to alter the operating system itself. As easily as it can download and install a legitimate update from Microsoft, it can download and install any bit of destructive malware from any other dodgy web site. Now why do you suppose it is that Windows users have so much more trouble with malware than users of Macintosh, Unix, and Linux systems?