583972 - firefox reports "Content Encoding Error" when "network.http.accept-encoding" sets to "gzip, deflate" (versions 3.5.5, 3.6.6)

Status: UNCONFIRMED

(Firefox :: General, defect)

Description

[Edward Emelianoff]

User-Agent:       Mozilla/5.0 (X11; Very secure; Linux i686; ru-RU; rv:1.9.2.6) Gecko/20100629 Mandriva Linux/1.9.2.6-0.1mdv2010.0 (2012.2) Firefox/9.9.9 GTB7.1
Build Identifier: Mozilla/5.0 (X11; Linux i686; ru-RU; rv:1.9.2.6) Gecko/20100629 Mandriva Linux/1.9.2.6-0.1mdv2010.0 Firefox/3.6.6 GTB7.1

When works through squid with parent proxy (Traffic Inspector), firefox shows "Content Encoding Error" when variable "network.http.accept-encoding" sets to default value "gzip, deflate". Other browser (konqueror) shows web pages normally.
If I set "network.http.accept-encoding" to empty value (""), firefox breaks web-formatting: there appears a 3-5 symbols-length artefacts in some regions of web-page. Also this artefacts appears in scripts and css, which cause bad formatting and/or some scripts don't work.

Reproducible: Always

Steps to Reproduce:
1. open any web page when firefox (with default settings) when use squid proxy, working through parent-"traffic inspector"
2. set "network.http.accept-encoding" to "" and open any web page (including local files)
Actual Results:  
1. firefox shows "Content Encoding Error"
2. firefox breaks formatting, the web-page contains a random artefacts, some scripts don't work

Expected Results:  
1.,2. show normally-formatted web-pages