I take back half the bads things I thought about the developers.... Rated 3 out of 5 stars

It's been programed (using flash, I think) and the dialog boxes run off the screen where you have to reset your screen resolution to see all of the dialog box as simply resizing the browser magnification doesn't solve this (it's an issue with some websites for people using older CRT 4:3 aspect monitors that needs to be addressed unless everyone wants those to end up in the dump prematurely)

It's possible that the dialog box issue is actually a flash issue but I would not be surprised at all to find out that it's simply that the developers of various pages and apps are simply being lazy and/or assuming everyone has a brand new nuclear-powered wide monitor or that everyone is not as environmentally-conscious as they claim and trashed their old monitors in favor of the newer ones with different screen resolution settings.

This makes it hard to find the settings to turn off the auto-inserting of your masked email address on some web pages.

I deleted my older, not as good review in light of the dialog boxes running off the screen MIGHT be a Flash issue..... but I'm not completely convinced of that.

This review is for a previous version of the add-on (3.2.1072.1-signed). 

Hello -

Thanks for your detailed review. To address a couple of your concerns/questions:
* You can turn off the auto-inserting of masked emails by opening DoNotTrackMe (click the browser toolbar icon) and going to Settings (gear icon on top right). Then just tick off "Auto fill Masked Emails for logins". Alternatively, if you want to turn it off for just specific websites, toggle "Don't track my email here" to off on whichever websites you want to.
* The UI is not done in Flash. It is javascript driven. If you have a low resolution monitor you should be able to use the browser magnification as you said. Just remember to click out of the form field and back into it for the dialog box to be "redrawn" and match back up with the field.

Also - do let us know if you have any additional thoughts or feedback. We care about what our users think and do our best to build a high quality experience.