Firefox 45 now available, should auto-update or download from
mozilla.org.
Biggest change looks to be add-on signing is enforced. Up to v45 anyone could create a Firefox add-on and make it available for download via un-official websites. As a result, some malicious add-ons - masked as something useful - were finding their way onto PCs. With v45 any unsigned (unapproved) add-ons won't run - for v45 this can be disabled:
Type
about:config in Firefox address bar >
Enter >
If the "Here be dragons!" warning appears click "I'll be careful" >
Scroll down to
xpinstall.signatures.required >
Double-click on it to toggle value from "true" to "false"
Starting v46 the disable option will be removed.
Probably best to get add-ons only from AMO:
addons.mozilla.orgTechnical point: afaik, add-on signing only applies to extensions, not to plug-ins (
What's the difference?)