Everything is fine except...
on Firefox, copy and paste does not work as others reported.
One star minus for that.
Hope this to be fixed soon!

(Fix my Twitter! works on Firefox without c/p issue.)

Does what it says on the tin. Simple and effective.

GodTwitter

Can't trust this.
EDIT: Cool then. Thank you.

Everyone who downloads this needs to look at what this addon can do: Access your data for sites in the twitter.com domain, Clear your browsing history, cookies and related data and can access your browser tabs. All this addon does is revert Twitter to the old layout, so why does it need to do all that? Its extremely fishy and reeks of privacy concerns.

Having just tried the new version, I can attest that copy and paste works for DMs, normal posts, and threads, both text and graphics, and the bug that caused it to scroll up is gone. There's a slight flash posting graphics, but no big issue. Thank you for your amazingly swift work!

Works like a charm after just clearing cookies failed. Thanks!

Works really well and easily for me, literally took like 5 clicks to get old Twitter back.

It seems to work OK but I notice that cut and paste in it is not working. Not sure why that is. You can reverse the horrible interface this way.

5 EASY STEPS CLICK
1) MORE (ON BOTTOM LEFT PANEL)
2) SETTINGS AND PRIVACY
3) ABOUT TWITTER
4) DIRECTORY (OPENS IN NEW TAB)
5) CLICK HOME TAB BINGO! OLD TWITTER INTERFACE RESTORED! >DON'T HIT REFRESH<

However, it's only temporary... I think with a few tweets this GoodTwitter can be the solution to this terrible idea twitter has.