Bugzilla

This bug is for crash report bp-4cb207df-64d5-4ec6-b5be-db1ec0200820.

Top 10 frames of crashing thread:
```
0 libgtk-3.so.0 gtk_printer_get_name ./debian/build/deb/gtk/../../../../gtk/gtkprinter.c:436
1 libprintbackend-cups.so <name omitted> ../../../../../../modules/printbackends/cups/gtkprintbackendcups.c:1874
2 libglib-2.0.so.0 <name omitted> ../../../glib/glist.c:922
3 libprintbackend-cups.so cups_request_printer_list_cb ../../../../../../modules/printbackends/cups/gtkprintbackendcups.c:3630
4 libprintbackend-cups.so cups_dispatch_watch_dispatch ../../../../../../modules/printbackends/cups/gtkprintbackendcups.c:1581
5 libglib-2.0.so.0 g_main_context_dispatch ../../../glib/gmain.c:3974
6 libglib-2.0.so.0 g_main_context_iterate ../../../glib/gmain.c:4047
7 libglib-2.0.so.0 <name omitted> ../../../glib/gmain.c:4241
8 libgtk-3.so.0 gtk_enumerate_printers ./debian/build/deb/gtk/../../../../gtk/gtkprinter.c:1285
9 libxul.so mozilla::detail::RunnableMethodImpl<nsDeviceContextSpecGTK*, void  xpcom/threads/nsThreadUtils.h:1240
```
**Affected versions**
* 81.0a1 (BuildId:20200819212829)

**Affected platforms**
* Ubuntu 20.04 64bit.

**Additional notes**
* The drivers for the printers were installed with hplip  3.20.6 (latest available at this time).
* This could have been an isolated case, I'll try to reproduce it again in order to get some more specific steps for this.


**Steps to reproduce**
1. Fresh install of the printer (HP MFP M28A in my case)
2. Open Firefox.
3. Navigate to any page and print it.


**Expected result**
* Page is correctly printed.

**Actual result**
*  Browser crashed and page was not printed.

**Regression Window**
* Not sure if this is a regression or not since I've only ran into it once so far.

**[Suggested Severity]**  
* S3

**Additional notes**
* The drivers for the printers were installed with hplip  3.20.6 (latest available at this time).
* This could have been an isolated case, I'll look into it in order to get some more specific steps.

This bug is for crash report bp-4cb207df-64d5-4ec6-b5be-db1ec0200820.

Top 10 frames of crashing thread:
```
0 libgtk-3.so.0 gtk_printer_get_name ./debian/build/deb/gtk/../../../../gtk/gtkprinter.c:436
1 libprintbackend-cups.so <name omitted> ../../../../../../modules/printbackends/cups/gtkprintbackendcups.c:1874
2 libglib-2.0.so.0 <name omitted> ../../../glib/glist.c:922
3 libprintbackend-cups.so cups_request_printer_list_cb ../../../../../../modules/printbackends/cups/gtkprintbackendcups.c:3630
4 libprintbackend-cups.so cups_dispatch_watch_dispatch ../../../../../../modules/printbackends/cups/gtkprintbackendcups.c:1581
5 libglib-2.0.so.0 g_main_context_dispatch ../../../glib/gmain.c:3974
6 libglib-2.0.so.0 g_main_context_iterate ../../../glib/gmain.c:4047
7 libglib-2.0.so.0 <name omitted> ../../../glib/gmain.c:4241
8 libgtk-3.so.0 gtk_enumerate_printers ./debian/build/deb/gtk/../../../../gtk/gtkprinter.c:1285
9 libxul.so mozilla::detail::RunnableMethodImpl<nsDeviceContextSpecGTK*, void  xpcom/threads/nsThreadUtils.h:1240
```
**Affected versions**
* 81.0a1 (BuildId:20200819212829)

**Affected platforms**
* Ubuntu 20.04 64bit.

**Additional notes**
* The drivers for the printers were installed with hplip  3.20.6 (latest available at this time).
* This could have been an isolated case, I'll look into it in order to get some more specific steps.


**Steps to reproduce**
1. Fresh install of the printer (HP MFP M28A in my case)
2. Open Firefox.
3. Navigate to any page and print it.


**Expected result**
* Page is correctly printed.

**Actual result**
*  Browser crashed and page was not printed.

**Regression Window**
* Not sure if this is a regression or not since I've only ran into it once so far.

**[Suggested Severity]**  
* S3