<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On 19 September 2017 at 04:54, Alex Davis <span dir="ltr"><<a href="mailto:adavis@mozilla.com" target="_blank">adavis@mozilla.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Apparently we didn't land any client-side telemetry for sync until
version 47 or so (i think?). that means that when we count users based
on FxA (not sync) stats, we will see a longer tail of users with older
versions. so when making this decision maybe we should pay attention to
that? </blockquote><div><br></div></span><div>This seems about right. Since Sync telemetry is client side, we won't have the full history.</div><div><br></div><div>@leif, I was reminded that we probably mostly care about multi-device users. If users are on Fx <40 but don't sync between 2 devices, do we really care? We wouldn't be providing much value to them. Any chance we can break this down by multi-device users instead of devices?<br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div>* We stop proactively testing on versions < X, but accept and fix reported bugs on that version<br></div><div>* We wont fix bugs that only affect versions < Y, but don't prevent users from attempting to use them</div><div>* We proactively error out when we detect a login attempt with version < Z</div></div></blockquote><div><br></div><div>Talking to Karlof in SF on Friday, he proposed something similar. Seems like the second bullet would make the most sense. We stop fixing old versions but don't prevent users from using them. This way we can be a bit more aggressive with which version we want to support and it encourages users to update.</div></div></blockquote><div><br></div><div><br></div><div>One consideration here may be cases where we know it *definitely won't work*, e.g. the browser is too old to support a webchannel message that we now depend on. We should try to error out cleanly in such cases rather than showing e.g. a "working" spinner that just hangs around indefinitely.</div><div><br></div><div><br></div><div> Ryan</div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra"><br clear="all"><div><div class="m_311240868245703104gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div></div><div>--<br>Alex Davis <span>// Mountain View</span></div><div>Product Manager // FxA & Sync<br></div>(415) 769-9247</div><span></span></div><div>IRC & Slack: adavis<br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div><div class="h5">
<br><div class="gmail_quote">On Mon, Sep 18, 2017 at 10:54 AM, Leif Oines <span dir="ltr"><<a href="mailto:loines@mozilla.com" target="_blank">loines@mozilla.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Thanks for running those numbers Mark. I've tried to recreate the same thing using the sync_summary_v2 derived dataset in re:dash. I suspect that since you're pulling raw pings perhaps we should trust those more... but I could be wrong. for comparison, below are the analogous numbers I'm getting from re:dash (<a href="https://sql.telemetry.mozilla.org/queries/38529" target="_blank">https://sql.telemetry.mozilla<wbr>.org/queries/38529</a>). they are based on the entire sync_summary_v2 dataset for the past 7 days.</div><div><br></div><div><table dir="ltr" style="table-layout:fixed;font-size:10pt;font-family:arial,sans,sans-serif;width:0px;border-collapse:collapse;border-color:currentcolor;border-style:none;border-width:medium" cellspacing="0" cellpadding="0" border="1"><colgroup><col width="116"><col width="100"><col width="100"></colgroup><tbody><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;font-weight:bold;text-align:center">version</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;font-weight:bold;text-align:center">counts</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;font-weight:bold;text-align:center">prop</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">48</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">1</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">50</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">47,569</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.01</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">51</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">53,285</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.01</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">52</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">500,793</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.06</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">53</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">136,974</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.02</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">54</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">906,476</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.11</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">55</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">5,987,420</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.76</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">56</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">92,960</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.01</td></tr><tr style="height:21px"><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">57</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">19,784</td><td style="overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0</td></tr></tbody></table></div><div><br></div><div>so, according to these numbers versions 52 and up should cover 98.7% . that's pretty close to what Mark estimates. however I have a couple questions/comments:</div><div><br></div><div>1. Mark you said that your numbers are based on a 10% sample, yet they seem to be around the same order of magnitude as my numbers. as far as i know sync_summary_v2 is not a sampled dataset, so do we know what the difference there might be?</div><div>2. Apparently we didn't land any client-side telemetry for sync until version 47 or so (i think?). that means that when we count users based on FxA (not sync) stats, we will see a longer tail of users with older versions. so when making this decision maybe we should pay attention to that? <br></div><div><br></div><div>with that in mind here are the comparable numbers for the FxA data. I omitted ios devices and versions with only 1 user:</div><div><a href="https://sql.telemetry.mozilla.org/queries/38604" target="_blank">https://sql.telemetry.mozilla.<wbr>org/queries/38604</a><br></div><div><br></div><div><table dir="ltr" style="table-layout:fixed;font-size:10pt;font-family:arial,sans,sans-serif;width:0px;border-collapse:collapse;border-color:currentcolor;border-style:none;border-width:medium" cellspacing="0" cellpadding="0" border="1"><colgroup><col width="100"><col width="100"><col width="100"></colgroup><tbody><tr style="height:21px"><td style="border-color:rgb(0,0,0);border-style:solid;border-width:1px;overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(190,192,191);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0)">version</td><td style="border-top:1px solid rgb(0,0,0);border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(190,192,191);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0)">counts</td><td style="border-top:1px solid rgb(0,0,0);border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(190,192,191);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0)">prop</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">40 and below</td><td style="border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">57,869.00</td><td style="border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:bottom;text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">41.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">15,443.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.00</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">42.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">14,849.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.00</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">43.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">37,472.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.00</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">44.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">17,411.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.00</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">45.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">55,595.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">46.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">21,085.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.00</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">47.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">108,109.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">48.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">113,114.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">49.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">68,451.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">50.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">81,087.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">51.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">82,610.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">52.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">626,233.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.06</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">53.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">207,903.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.02</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">54.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">1,037,261.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.10</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">55.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">7,741,729.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.74</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">56.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">153,630.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.01</td></tr><tr style="height:21px"><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);border-left:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;background-color:rgb(220,220,220);font-family:Helvetica;font-weight:bold;color:rgb(0,0,0);text-align:right">57.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">32,955.00</td><td style="border-right:1px solid rgb(0,0,0);border-bottom:1px solid rgb(0,0,0);overflow:hidden;padding:2px 3px;vertical-align:top;font-family:Helvetica;font-weight:normal;color:rgb(0,0,0);text-align:right">0.00</td></tr></tbody></table></div><div class="gmail_extra"><br></div><div class="gmail_extra">Here, 52 and up covers only 93.5% of users. to cover 99% we would need to go back to 43. to cover ~97%, version 48. <br></div><div class="gmail_extra"><br></div><div class="gmail_extra">hope that helps!</div><span class="m_311240868245703104HOEnZb"><font color="#888888"><div class="gmail_extra">-Leif<br></div></font></span><div><div class="m_311240868245703104h5"><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 18, 2017 at 12:55 AM, Mark Hammond <span dir="ltr"><<a href="mailto:mhammond@mozilla.com" target="_blank">mhammond@mozilla.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="m_311240868245703104m_-2017767928015718677gmail-">On 18/09/2017 10:20 AM, Ryan Kelly wrote:<br>
> On 15 September 2017 at 10:35, Alex Davis <<a href="mailto:adavis@mozilla.com" target="_blank">adavis@mozilla.com</a><br>
</span><span class="m_311240868245703104m_-2017767928015718677gmail-">> <mailto:<a href="mailto:adavis@mozilla.com" target="_blank">adavis@mozilla.com</a>>> wrote:<br>
><br>
> If we were more aggressive and did 52, we'd cover 87.7% of<br>
</span>> users... which seems *too* aggressive but perhaps we can see if<br>
<span class="m_311240868245703104m_-2017767928015718677gmail-">> we can try to nudge people to upgrade first.<br>
><br>
><br>
> I'd like to make a correction. It's 92.62% of users that are 52 or<br>
> higher.<br>
><br>
><br>
> That does seem aggressive, but we could also consider a nuanced approach<br>
> to phasing out support, because we have the following possibilities for<br>
> what "removing support" means:<br>
<br>
</span>I'm slightly skeptical of that data (although a quick look doesn't make<br>
it clear there's anything wrong with it, if there actually is) - but my<br>
understanding has always been that the uptake of new Firefox versions is<br>
slower than we'd like, but generally successful within the 6 week cycle.<br>
<br>
By contrast, if I look at 10% of all desktop Firefoxes that submitted a<br>
sync ping in the last 7 days I get:<br>
<br>
49 - 1, 0.00<br>
50 - 26527, 0.34<br>
51 - 27602, 0.35<br>
52 - 419814, 5.31<br>
53 - 56468, 0.71<br>
54 - 257171, 3.26<br>
55 - 7002788, 88.63<br>
56 - 83928, 1.06<br>
57 - 26413, 0.33<br>
<br>
so in that 10% sample, there was exactly 1 version 49. Looking at 52<br>
(current ESR) and up gives ~99.3% of all pings.<br>
<br>
<a href="https://gist.github.com/mhammond/46906eb3de269f3969e2fffc6dd801eb" rel="noreferrer" target="_blank">https://gist.github.com/mhammo<wbr>nd/46906eb3de269f3969e2fffc6dd<wbr>801eb</a><br>
<br>
FWIW, going back 28 days (still a 10% sample) shows the same basic<br>
pattern, although obviously 54 is higher due to it being the current<br>
release for some of that period.<br>
<br>
49 - 5, 0.00<br>
50 - 109896, 0.36<br>
51 - 117934, 0.39<br>
52 - 1829602, 6.03<br>
53 - 231241, 0.76<br>
54 - 6847774, 22.58<br>
55 - 20751445, 68.42<br>
56 - 343482, 1.13<br>
57 - 98950, 0.33<br>
<br>
(this is the same gist as above, but ndays=28 instead of ndays=7)<br>
<span class="m_311240868245703104m_-2017767928015718677gmail-HOEnZb"><font color="#888888"><br>
Mark<br>
<br>
</font></span></blockquote></div><br></div></div></div></div>
</blockquote></div><br></div></div></div>
</blockquote></div><br></div></div>