Alas, as of the 1st June, changes at Twitter has meant these extensions no longer work and you are now forced to use the new Twitter! Links have been removed to the extensions.
So you don’t like the new Twitter?
Well you can revert back to the old one in a couple of ways.
If you are running Chrome or Firefox then there is an extension you can install which forces your browser to use the old Twitter interface.
GoodTwitter for Chrome GoodTwitter for Firefox
Install the extensions and your browser forces Twitter to use the old interface!
There is another way without installing an extension which is as follows.
Click Settings and Privacy
Click About Twitter
Click Home (sometimes you click Notifications first)
You should then have old Twitter back.
So there is a lack of persistence, but there is also a quicker method is to use the URL
which I’ve added to my bookmarks for quick access.
I can’t get this method to work on Safari and persist though.