For anyone that still missing this awesome trading tool, I fixed the code for Chrome and ported a release of the extension for Firefox.
To install in Firefox just download the signed xpi at https://github.com/dkgeorge/bittrex-enhanced/releases
For Chrome, download the extension from master as a .zip by looking for the “Download ZIP” button on the right-hand side of the project page on GitHub. Now extract/unzip the code somewhere. Then in Chrome go to Menu (the three lines)->More tools->Extensions. Click the “Developer mode” checkbox and then click the button labeled “Load unpacked extension…”.