To restore the add-on bar, I had to install another add-on.
Im not real clear why firefox thought it was a good idea to remove the add-on bar without asking any of the people who use it, but the outcry was something like what is going on right now with reddit.
The seo add on that didnt work has over one million installs yet firefox totally borked it.
If a business model is predicated on giving free stuff to the public, the staff, directors and investors do not understand that its users or members have a legitimate ownership stake.
That they did not pay for the product or service, that they agreed to the terms of service or copyright license or even copyright assignment is not a consideration. That something is legal doesnt particularly imply that it is ethical.
Or that it makes sense. Look at the smoking radioactive crater that reddit the company made of reddit the website. I dont blame Ellen Pao, the problems arose long before she hired on. I blame the directors, the directors hired Pao to act as a spokeswoman for the ignorant.
It installed OK, I relaunched tenfourfox then couldn't figure out where the add-on's UI. When I clicked the Add-Ons icon in the "Pile of Elephant Droppings" menu I could not find anything.
Knowing that Firefox is always screwing up UI that works well for me I spent a half hour or so trying to find the Add-On's UI. Eventually I figured it must be in the status bar, which was disabled, so I spent another hour or so trying to figure out how to enable the status bar.
Then I found some jackass firefox developer who, in response to a public outcry from others said simply "The Add-On bar has been deprecated."
By who? I certainly didn't deprecate it; it worked really well for me.