Found while working on bug 1108995. An example can be seen here: https://activations.paas.allizom.org/en-US/sharePanel.html The names for the providers are doubled, so it is "Facebook Facebook", for example. The live exposure is in Firefox: 1. Right-click any link and select "Share this link". 2. You're being asked to choose providers to add to the tool bar. All of the names are duplicated in the a11y API. This is, after bug 1108995 is fixed.