I am trying to install an extension in Firefox 45 (same happens with Firefox 49), but Firefox does not allow me to do that, indicating that This add-on could
smtp-oauth
adjustable
aceoledb
custom-view
motionbuilder
object-composition
autoencoder
itemwriter
angularjs-ng-switch
hellosign-api
kovan
feast
psse
completion-service
darkflow
maven-enforcer-plugin
multisite
ipyleaflet
autotile
upx
pyflux
imdb
mkdocs
hg-git
hook
non-type-template-parameter
jqgrid
phpickerviewcontroller
lockbits
pyzmq
