Old versions of Firefox, up toFirefox version 45 that we ran on the local 32 bit linux VM, would not take us to the search term occurring on a document's page, upon clicking on a search result. There were errors in the browser development console, about utility_scripts.js: one after another, the usage of the const keyword in this js script file required fixing (changing to var). Committing a version of this script file where there's been a blind replace of all occurrences of const-SPACE- with var-SPACE-, and will add a note in the ReleaseNotes to let users with old versions of browsers to know that they can make this version of the script active should they encounter the same problem.