[Firefox] Wasavi painfully slow with e10s

[Timvde]

When using in an e10s (multi-process) enabled Firefox build, Wasavi slows down the entire browser to a crawl. This is probably due to excessive usage of CPOWs.

More information on https://developer.mozilla.org/en-US/Add-ons/Working_with_multiprocess_Firefox and https://developer.mozilla.org/en-US/Firefox/Multiprocess_Firefox/Limitations_of_chrome_scripts

[akahuku]

Thank you.
The latest wasavi is based on the WebExtensions technology.
So, there should be no interprocess communication by CPOW.

[Timvde]

Doesn't seem to work :( Although it's not your fault.

From the browser console:

wasavi backend: ERROR: TypeError: chrome.identity.onSignInChanged is undefined

Which is not supported yet according to Are We WebExtensions Yet?. A quick search on Bugzilla pointed me to bug 1320862.

Going from the Wasavi code, it seems like this has something to do with sync. Is there an easy way to disable it? I don't need (nor want) to sync anything.

[Timvde]

Thanks, it's a step closer to working in Firefox! Now the issue is that chrome.tabs.sendRequest is undefined. It is marked as deprecated and replaced by sendMessage. Mozilla has decided not to implement any deprecated APIs.

I would try this myself, since the change seems trivial, but I didn't manage to build the add-on. I installed npm, ran npm install (which ended with errors, it said it could not run distribute-scripts), then ran distribute-scripts myself (no output here at all), and finally make xpi (which failed too). Do you have build instructions somewhere? It is my first time ever I try to build an add-on myself, so sorry if I did something stupid :)

[Timvde]

Looks like we're still a way off. Firefox also doesn't support clipboardRead yet.

[akahuku]

I added the document about build and test wasavi:
https://github.com/akahuku/wasavi/blob/master/BUILD-AND-TEST.md

It is not mandatory to build xpi to develop wasavi. Install web-ext with npm, and

$ make debug-firefox

The command launches Firefox for debugging with built-in wasavi.

[Timvde]

I just tested the latest unstable release, and it works great on Nightly! Thanks :)