For those of you that have a problem with opening pdf files in TB when this extension is installed, the author's suggestion of creating a boolean variable in about: cofig named "extensions.linkPropertiesPlus.download.forceFakeURIHack" (without the quotes ""), when set to "True", solves the problem.
If the variable is set to "False", when attempting to open a pdf file, both the pdf opening dialogue screen and TB hang will continue to hang as previously reported.
I'm now happy to up the rating to 5 stars, and am very pleased that this extension, unlike the original extension, supports TB.
This review is for a previous version of the add-on (126.96.36.199-signed).
This user has a previous review of this add-on.