I recently posted the below question on the firefox website:
I have Firefox 46.0 on Ubuntu 14.04 and a few days ago the arrows of the scrollbar disappeared. I have the scrollbar but the up and down arrows are gone so it is more inconvenient to scroll websites up and down. Can you please confirm how I can fix this issue? Please see the screen shot attached for reference.
I got the following answer:
You can try to use a different GTK 3 theme in case the theme you currently use isn't working properly with Firefox 46+.
Note that Firefox 46.0 and later requires GTK+ 3.4 as a minimum and you need a GTK 3 theme.
So I checked what version of GTK I have and I found the following.
apt-cache policy libgtk2.0-0 libgtk-3-0:
libgtk2.0-0: Installed: 2.24.23-0ubuntu1.4 Candidate: 2.24.23-0ubuntu1.4 Version table: *** 2.24.23-0ubuntu1.4 0 500 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxPackages 500 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Packages 100 /var/lib/dpkg/status 2.24.23-0ubuntu1 0 500 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Packages libgtk-3-0: Installed: 3.10.8-0ubuntu1.6 Candidate: 3.10.8-0ubuntu1.6 Version table: *** 3.10.8-0ubuntu1.6 0 500 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx >Packages 100 /var/lib/dpkg/status 3.10.8-0ubuntu1.4 0 500 xxxxxxxxxxxxxxxxxxxxxxxx >Packages> 3.10.8-0ubuntu1 0 500 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
Can somebody please help me and let me know how I change the GTK in Firefox as suggested by Firefox support?
Please note I had to replace the links with xxxxxx in the above terminal output because I don't have enough reputation to post more than 2 links.
This maybe a bit late but maybe someone will use it.
There is an addon for Firefox that changes the scroll bars, called "NewScrollbars (aka NoiaScrollbars)" that may be what your looking for.
The addon changes the new thin scrollbar to a wider one, it also has color settings for the scrollbar.
I can't stand the new interface in Firefox so I have several addon's to get back the old interface this happens to be one of them. Sadly Mozilla is update happy and keeps playing with Firefox in the process loosing much of what brought users to Firefox in the first place
This addin can be found on the Palemoon addins pages it will still work in those using Firefox versions before 57, this also works in the LTS versions of Firefox. Pale moon addins "NewScrollbars (aka NoiaScrollbars)" Just download the xpi, then open it in Firefox, and if version compatible it will install.
You will find many of the older addins on the palemoon site, many are just the same as the Firefox version.