[tbb-bugs] #28609 [Applications/Tor Browser]: browser.windows.create(createData) sometimes not displayed

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#28609: browser.windows.create(createData) sometimes not displayed
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 Reporter:  NemoVoid                  |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-usability             |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by NemoVoid):

 I changed every setting (in about:config) listed in that file on git, to
 match the setting on firefox 60.3.0 esr. The exception, which were **not**
 changed are:
 startup.homepage_welcome_url, startup.homepage_override_url,
 extensions.hotfix.id, browser.download.manager.retention,
 datareporting.healthreport.about.reportUrl,
 datareporting.healthreport.about.reportUrlUnified,
 browser.syncPromoViewsLeftMap, browser.pocket.api, browser.pocket.site,
 general.appname.override, general.appversion.override,
 general.oscpu.override, general.platform.override,
 general.productSub.override, general.buildID.override,
 browser.startup.homepage_override.buildID, general.useragent.vendor,
 general.useragent.vendorSub, intl.charset.default,
 network.security.ports.banned, network.gio.supported-protocols, media.gmp-
 manager.url.override, network.file.path_blacklist,
 extensions.bootstrappedAddons, extensions.enabledAddons,
 extensions.enabledItems, xpinstall.whitelist.add,
 xpinstall.whitelist.add.36, extensions.legacy.exceptions,
 extensions.webextensions.restrictedDomains, browser.uiCustomization.state,
 browser.search.defaultenginename, browser.search.order.extra.1,
 browser.search.order.extra.2, dom.securecontext.whitelist_onions,
 browser.onboarding.newtour, browser.onboarding.updatetour,
 browser.onboarding.skip-tour-button.hide and all parameters beginning
 font.*

 In general those settings which made no sense to change and where there
 wasn't an equivalent parameter in FF I left alone.The browser still ran
 but the **error was still present**.

 Interestingly the browser knows that there should be text displayed
 because it changes the mouse pointer when you hover over where it should
 be it. I thought at one time it might be getting displayed as white on
 white, so I set the style of text to red - it still didn't display it.

 I also noticed that extensions.pendingOperations changes its type in the
 file on git - it's set as an integer and then as a string - I assume it's
 not a typo in the name.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28609#comment:3>
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