### Basic information Steps to Reproduce: 1. Have a lot of Firefox windows and tabs 2. Navigate to `about:newtab` in every open window (15) 3. quit Firefox, restore session Expected Results: Firefox should open in 11 seconds or less (Chromium manages this, so using this as a baseline) with no visible loading occurring. Actual Results: Firefox takes nearly a minute to load. --- ### More information This isn't a stress test by any means - I regularly open a Firefox session with 15 windows, and with many extensions enabled. For this test, for troubleshooting purposes, I disabled my extensions and navigated to `about:newtab` to try to get a good baseline for a best case scenario with this many windows. The fact that Chromium can open 15 windows with the Bing newtab (which has live content loaded) makes this is the number to beat. Profile URL: https://share.firefox.dev/2BqHPjY #### Basic systems configuration: OS version: Ubuntu 20.10 GPU model: Intel(R) HD Graphics 630 (KBL GT2) Number of cores: 4 Amount of memory (RAM): 24GB Thanks so much for your help.
Bug 1650250 Comment 0 Edit History
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### Basic information Steps to Reproduce: 1. Have a lot of Firefox windows and tabs 2. Navigate to `about:newtab` in every open window (15) 3. quit Firefox, restore session Expected Results: Firefox should open in 11 seconds or less (Chromium manages this, so using this as a baseline) with no visible loading occurring. Actual Results: Firefox takes nearly a minute to load. --- ### More information This isn't a stress test by any means - I regularly open a Firefox session with 15 windows, and with many extensions enabled. For this test, for troubleshooting purposes, I disabled my extensions and navigated to `about:newtab` to try to get a good baseline for a best case scenario with this many windows. The fact that Chromium can open 15 windows with the Bing newtab (which has live content loaded) makes this is the number to beat. Profile URL: https://share.firefox.dev/2BqHPjY #### Basic systems configuration: OS version: Ubuntu 20.10 GPU model: Intel(R) HD Graphics 630 (KBL GT2) Number of cores: 4 Amount of memory (RAM): 24GB Thanks so much for your help.
### Basic information Steps to Reproduce: 1. Have a lot of Firefox windows and tabs 2. Navigate to `about:newtab` in every open window (15) 3. quit Firefox, restore session Expected Results: Firefox should open in 11 seconds or less (Chromium manages this, so using this as a baseline) with no visible loading occurring. Actual Results: Firefox takes nearly a minute to load. --- ### More information This isn't a stress test by any means - I regularly open a Firefox session with 15 windows, and with many extensions enabled. For this test, for troubleshooting purposes, I disabled my extensions and navigated to `about:newtab` to try to get a good baseline for a best case scenario with this many windows. The fact that Chromium can open 15 windows with the Bing newtab (which has live content loaded) in a short amount of time makes this is the number to beat. Profile URL: https://share.firefox.dev/2BqHPjY #### Basic systems configuration: OS version: Ubuntu 20.10 GPU model: Intel(R) HD Graphics 630 (KBL GT2) Number of cores: 4 Amount of memory (RAM): 24GB Thanks so much for your help.