1055808 - [e10s] Can't install local addons: opening an xpi link causes "Error: Insufficient permissions to install..."

Status: RESOLVED DUPLICATE of bug 1082764

(Firefox :: Extension Compatibility, defect)

Description

[Will Bamberg [:wbamberg]]

I can't install add-ons by opening a local XPI.

Using the latest Nightly, if I enable e10s (browser.tabs.remote.autostart=true) then try to install an add-on by opening an XPI file on my machine, installation fails and a line like this is logged to the Browser Console:

"amContentHandler.js: Error: Insufficient permissions to install: file:///..."

The add-on that I used is here: https://github.com/mdn/e10s-example-addons/tree/master/run-script-in-all-pages/original

Comment 1

[YUKI "Piro" Hiroshi]

I've confirmed this problem on Ubuntu.
This is very serious problem for addon authors...

Comment 2

[Edward O]

I am sure if it is related or should be filed separately, but I cannot install xpis from within the browser in FF-35.0a1-x64 the way I can on FF-32.0.3-32b ( the above example prompts me to download it ; and this other link actually does nothing at all: http://people.mozilla.org/%7Ejschoenick/treestyletab_noupdate.xpi )

However, downloading then using "Install add-on from file" seems to work for me (I don't get the error from OP).

Comment 3

[YUKI "Piro" Hiroshi]

A workaround: drag the XPI file and drop it to the "about:addons" page, then it is installed even if e10s is enabled.